diff --git a/akka-http/pom.xml b/akka-http/pom.xml
index 51e70fb583e0..05e50d2229d3 100644
--- a/akka-http/pom.xml
+++ b/akka-http/pom.xml
@@ -23,7 +23,7 @@
 		<dependency>
 			<groupId>com.typesafe.akka</groupId>
 			<artifactId>akka-stream_2.12</artifactId>
-			<version>2.5.11</version>
+			<version>${akka.stream.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>com.typesafe.akka</groupId>
diff --git a/algorithms-miscellaneous-2/pom.xml b/algorithms-miscellaneous-2/pom.xml
index 5461f4ebe16d..d5f3172eaaa6 100644
--- a/algorithms-miscellaneous-2/pom.xml
+++ b/algorithms-miscellaneous-2/pom.xml
@@ -68,7 +68,7 @@
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>cobertura-maven-plugin</artifactId>
-                <version>2.7</version>
+                <version>${cobertura-maven-plugin.version}</version>
                 <configuration>
                     <instrumentation>
                         <ignores>
@@ -91,6 +91,7 @@
         <org.jgrapht.ext.version>1.0.1</org.jgrapht.ext.version>
         <org.assertj.core.version>3.9.0</org.assertj.core.version>
         <commons-codec.version>1.11</commons-codec.version>
+        <cobertura-maven-plugin.version>2.7</cobertura-maven-plugin.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/algorithms-miscellaneous-2/src/test/resources/graph.png b/algorithms-miscellaneous-2/src/test/resources/graph.png
index 56995b8dd9be..7165a517824f 100644
Binary files a/algorithms-miscellaneous-2/src/test/resources/graph.png and b/algorithms-miscellaneous-2/src/test/resources/graph.png differ
diff --git a/apache-geode/pom.xml b/apache-geode/pom.xml
index 738accdcb83c..a39e4a811e3d 100644
--- a/apache-geode/pom.xml
+++ b/apache-geode/pom.xml
@@ -12,22 +12,6 @@
         <artifactId>parent-modules</artifactId>
         <version>1.0.0-SNAPSHOT</version>
     </parent>
-    
-    <properties>
-        <geode.core>1.6.0</geode.core>
-    </properties>
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
-                </configuration>
-            </plugin>
-        </plugins>
-    </build>
 
     <dependencies>
         <dependency>
@@ -38,8 +22,26 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>RELEASE</version>
+            <version>${junit.version}</version>
         </dependency>
     </dependencies>
     
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+	
+    <properties>
+        <geode.core>1.6.0</geode.core>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+    </properties>
 </project>
\ No newline at end of file
diff --git a/apache-meecrowave/pom.xml b/apache-meecrowave/pom.xml
index cf13aa1c1b49..fb5af69f9b55 100644
--- a/apache-meecrowave/pom.xml
+++ b/apache-meecrowave/pom.xml
@@ -7,51 +7,58 @@
     <name>apache-meecrowave</name>
     <description>A sample REST API application with Meecrowave</description>
 
-    <properties>
-        <maven.compiler.source>1.8</maven.compiler.source>
-        <maven.compiler.target>1.8</maven.compiler.target>
-    </properties>
     <dependencies>
         <!-- https://mvnrepository.com/artifact/org.apache.meecrowave/meecrowave-core -->
         <dependency>
             <groupId>org.apache.meecrowave</groupId>
             <artifactId>meecrowave-core</artifactId>
-            <version>1.2.1</version>
+            <version>${meecrowave-core.version}</version>
         </dependency>
         <!-- https://mvnrepository.com/artifact/org.apache.meecrowave/meecrowave-jpa -->
         <dependency>
             <groupId>org.apache.meecrowave</groupId>
             <artifactId>meecrowave-jpa</artifactId>
-            <version>1.2.1</version>
+            <version>${meecrowave-jpa.version}</version>
         </dependency>
 
         <dependency>
             <groupId>com.squareup.okhttp3</groupId>
             <artifactId>okhttp</artifactId>
-            <version>3.10.0</version>
+            <version>${okhttp.version}</version>
         </dependency>
         <dependency>
             <groupId>org.apache.meecrowave</groupId>
             <artifactId>meecrowave-junit</artifactId>
-            <version>1.2.0</version>
+            <version>${meecrowave-junit.version}</version>
             <scope>test</scope>
         </dependency>
         <!-- https://mvnrepository.com/artifact/junit/junit -->
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.10</version>
+            <version>${junit.version}</version>
             <scope>test</scope>
         </dependency>
-
     </dependencies>
+	
     <build>
         <plugins>
             <plugin>
                 <groupId>org.apache.meecrowave</groupId>
                 <artifactId>meecrowave-maven-plugin</artifactId>
-                <version>1.2.1</version>
+                <version>${meecrowave-maven-plugin.version}</version>
             </plugin>
         </plugins>
     </build>
+	
+    <properties>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+		<junit.version>4.10</junit.version>
+		<meecrowave-junit.version>1.2.0</meecrowave-junit.version>
+		<okhttp.version>3.10.0</okhttp.version>
+		<meecrowave-jpa.version>1.2.1</meecrowave-jpa.version>
+		<meecrowave-core.version>1.2.1</meecrowave-core.version>
+		<meecrowave-maven-plugin.version>1.2.1</meecrowave-maven-plugin.version>
+    </properties>
 </project>
\ No newline at end of file
diff --git a/apache-pulsar/pom.xml b/apache-pulsar/pom.xml
index a4c09586ebdd..11df6d0b8760 100644
--- a/apache-pulsar/pom.xml
+++ b/apache-pulsar/pom.xml
@@ -11,12 +11,14 @@
         <dependency>
             <groupId>org.apache.pulsar</groupId>
             <artifactId>pulsar-client</artifactId>
-            <version>2.1.1-incubating</version>
+            <version>${pulsar-client.version}</version>
             <scope>compile</scope>
         </dependency>
     </dependencies>
+	
     <properties>
         <maven.compiler.target>1.8</maven.compiler.target>
         <maven.compiler.source>1.8</maven.compiler.source>
+		<pulsar-client.version>2.1.1-incubating</pulsar-client.version>
     </properties>
 </project>
diff --git a/apache-spark/pom.xml b/apache-spark/pom.xml
index b05b97198dcb..d5ea105b912e 100644
--- a/apache-spark/pom.xml
+++ b/apache-spark/pom.xml
@@ -54,10 +54,10 @@
     	  	<plugin>
     			<groupId>org.apache.maven.plugins</groupId>
     			<artifactId>maven-compiler-plugin</artifactId>
-    			<version>3.2</version>
+    			<version>${maven-compiler-plugin.version}</version>
     			<configuration>
-      				<source>1.8</source>
-      				<target>1.8</target>
+      				<source>${maven.compiler.source}</source>
+      				<target>${maven.compiler.target}</target>
     			</configuration>
   			</plugin>
       		<plugin>
@@ -85,6 +85,9 @@
         <org.apache.spark.spark-streaming-kafka.version>2.3.0</org.apache.spark.spark-streaming-kafka.version>
         <com.datastax.spark.spark-cassandra-connector.version>2.3.0</com.datastax.spark.spark-cassandra-connector.version>
         <com.datastax.spark.spark-cassandra-connector-java.version>1.5.2</com.datastax.spark.spark-cassandra-connector-java.version>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+		<maven-compiler-plugin.version>3.2</maven-compiler-plugin.version>
     </properties>
 
 </project>
diff --git a/axon/pom.xml b/axon/pom.xml
index 598dc820e55d..2b9ac1fcdd18 100644
--- a/axon/pom.xml
+++ b/axon/pom.xml
@@ -36,7 +36,7 @@
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-autoconfigure</artifactId>
-            <version>2.1.1.RELEASE</version>
+            <version>${spring-boot.version}</version>
             <scope>compile</scope>
         </dependency>
 
diff --git a/blade/pom.xml b/blade/pom.xml
index 6bad505f4ab5..37615bed0165 100644
--- a/blade/pom.xml
+++ b/blade/pom.xml
@@ -3,12 +3,12 @@
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
 
     <modelVersion>4.0.0</modelVersion>
-    <artifactId>blade</artifactId>
-    <name>blade</name>
-
     <!-- WITH THIS mvn integration-test DOES WORK -->
     <groupId>com.baeldung</groupId>
+    <artifactId>blade</artifactId>
     <version>1.0.0-SNAPSHOT</version>
+    <name>blade</name>
+
 
     <!-- WITH THIS mvn integration-test DOESN'T WORK -->
     <!-- <parent> -->
@@ -17,35 +17,30 @@
     <!-- <version>1.0.0-SNAPSHOT</version> -->
     <!-- </parent> -->
 
-    <properties>
-        <maven.compiler.source>1.8</maven.compiler.source>
-        <maven.compiler.target>1.8</maven.compiler.target>
-    </properties>
-
     <dependencies>
         <dependency>
             <groupId>com.bladejava</groupId>
             <artifactId>blade-mvc</artifactId>
-            <version>2.0.14.RELEASE</version>
+            <version>${blade-mvc.version}</version>
         </dependency>
 
         <dependency>
             <groupId>org.webjars</groupId>
             <artifactId>bootstrap</artifactId>
-            <version>4.2.1</version>
+            <version>${bootstrap.version}</version>
         </dependency>
 
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
-            <version>3.8.1</version>
+            <version>${commons-lang3.version}</version>
         </dependency>
 
         <!-- PROVIDED -->
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
-            <version>1.18.4</version>
+            <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>
 
@@ -53,31 +48,31 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>${junit.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.assertj</groupId>
             <artifactId>assertj-core</artifactId>
-            <version>3.11.1</version>
+            <version>${assertj-core.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>
             <artifactId>httpclient</artifactId>
-            <version>4.5.6</version>
+            <version>${httpclient.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>
             <artifactId>httpmime</artifactId>
-            <version>4.5.6</version>
+            <version>${httpmime.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>
             <artifactId>httpcore</artifactId>
-            <version>4.4.10</version>
+            <version>${httpcore.version}</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
@@ -88,6 +83,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-surefire-plugin</artifactId>
+                <version>${maven-surefire-plugin.version}</version>
                 <configuration>
                     <forkCount>3</forkCount>
                     <reuseForks>true</reuseForks>
@@ -100,7 +96,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-failsafe-plugin</artifactId>
-                <version>3.0.0-M3</version>
+                <version>${maven-failsafe-plugin.version}</version>
                 <configuration>
                     <includes>
                         <include>**/*LiveTest.java</include>
@@ -119,7 +115,7 @@
             <plugin>
                 <groupId>com.bazaarvoice.maven.plugins</groupId>
                 <artifactId>process-exec-maven-plugin</artifactId>
-                <version>0.7</version>
+                <version>${process-exec-maven-plugin.version}</version>
                 <executions>
                     <!--Start Blade -->
                     <execution>
@@ -177,13 +173,33 @@
                 </executions>
             </plugin>
             <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <version>${maven-compiler-plugin.version}</version>
                 <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
                     <encoding>UTF-8</encoding>
                 </configuration>
             </plugin>
         </plugins>
     </build>
+	
+    <properties>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+		<blade-mvc.version>2.0.14.RELEASE</blade-mvc.version>
+		<bootstrap.version>4.2.1</bootstrap.version>
+		<commons-lang3.version>3.8.1</commons-lang3.version>
+		<lombok.version>1.18.4</lombok.version>
+		<junit.version>4.12</junit.version>
+		<httpclient.version>4.5.6</httpclient.version>
+		<httpmime.version>4.5.6</httpmime.version>
+		<httpcore.version>4.4.10</httpcore.version>
+		<assertj-core.version>3.11.1</assertj-core.version>
+		<maven-failsafe-plugin.version>3.0.0-M3</maven-failsafe-plugin.version>
+		<process-exec-maven-plugin.version>0.7</process-exec-maven-plugin.version>
+		<maven-surefire-plugin.version>2.21.0</maven-surefire-plugin.version>
+		<maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
+    </properties>
 </project>
diff --git a/cdi/pom.xml b/cdi/pom.xml
index 0cf5062cccf7..ba649127a07d 100644
--- a/cdi/pom.xml
+++ b/cdi/pom.xml
@@ -59,6 +59,7 @@
             <scope>test</scope>
         </dependency>
     </dependencies>
+	
     <properties>
         <cdi-api.version>2.0.SP1</cdi-api.version>
         <weld-se-core.version>3.0.5.Final</weld-se-core.version>
diff --git a/core-java-collections-list/pom.xml b/core-java-collections-list/pom.xml
index a7e711088ac9..2b1aee6e479c 100644
--- a/core-java-collections-list/pom.xml
+++ b/core-java-collections-list/pom.xml
@@ -40,17 +40,17 @@
         <dependency>
             <groupId>net.sf.trove4j</groupId>
             <artifactId>trove4j</artifactId>
-            <version>3.0.2</version>
+            <version>${trove4j.version}</version>
         </dependency>
         <dependency>
             <groupId>it.unimi.dsi</groupId>
             <artifactId>fastutil</artifactId>
-            <version>8.1.0</version>
+            <version>${fastutil.version}</version>
         </dependency>
         <dependency>
             <groupId>colt</groupId>
             <artifactId>colt</artifactId>
-            <version>1.2.0</version>
+            <version>${colt.version}</version>
         </dependency>
     </dependencies>
 
@@ -60,5 +60,8 @@
         <avaitility.version>1.7.0</avaitility.version>
         <assertj.version>3.11.1</assertj.version>
         <lombok.version>1.16.12</lombok.version>
+		<trove4j.version>3.0.2</trove4j.version>
+		<fastutil.version>8.1.0</fastutil.version>
+		<colt.version>1.2.0</colt.version>
     </properties>
 </project>
diff --git a/core-java-collections/pom.xml b/core-java-collections/pom.xml
index 2201ee8b156b..38d2f9aee3fb 100644
--- a/core-java-collections/pom.xml
+++ b/core-java-collections/pom.xml
@@ -54,7 +54,7 @@
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-exec</artifactId>
-            <version>1.3</version>
+            <version>${commons-exec.version}</version>
         </dependency>
         <dependency>
             <groupId>org.projectlombok</groupId>
@@ -74,5 +74,6 @@
         <assertj.version>3.11.1</assertj.version>
         <eclipse.collections.version>7.1.0</eclipse.collections.version>
         <lombok.version>1.16.12</lombok.version>
+		<commons-exec.version>1.3</commons-exec.version>
     </properties>
 </project>
diff --git a/core-kotlin/pom.xml b/core-kotlin/pom.xml
index ed79ebc01b8f..5de986b49e01 100644
--- a/core-kotlin/pom.xml
+++ b/core-kotlin/pom.xml
@@ -64,13 +64,13 @@
         <dependency>
             <groupId>nl.komponents.kovenant</groupId>
             <artifactId>kovenant</artifactId>
-            <version>3.3.0</version>
+            <version>${kovenant.version}</version>
             <type>pom</type>
         </dependency>
         <dependency>
             <groupId>uy.kohesive.injekt</groupId>
             <artifactId>injekt-core</artifactId>
-            <version>1.16.1</version>
+            <version>${injekt-core.version}</version>
         </dependency>
     </dependencies>
 
@@ -82,6 +82,8 @@
         <assertj.version>3.10.0</assertj.version>
         <h2database.version>1.4.197</h2database.version>
         <fuel.version>1.15.0</fuel.version>
+		<kovenant.version>3.3.0</kovenant.version>
+		<injekt-core.version>1.16.1</injekt-core.version>
     </properties>
 
 </project>
diff --git a/flyway-cdi-extension/pom.xml b/flyway-cdi-extension/pom.xml
index dbb32f1e5a4e..f49a51ea4b43 100644
--- a/flyway-cdi-extension/pom.xml
+++ b/flyway-cdi-extension/pom.xml
@@ -8,44 +8,49 @@
     <version>1.0-SNAPSHOT</version>
     <name>flyway-cdi-extension</name>
 
-    <properties>
-        <maven.compiler.source>1.8</maven.compiler.source>
-        <maven.compiler.target>1.8</maven.compiler.target>
-    </properties>
-
     <dependencies>
         <dependency>
             <groupId>javax.enterprise</groupId>
             <artifactId>cdi-api</artifactId>
-            <version>2.0.SP1</version>
+            <version>${cdi-api.version}</version>
         </dependency>
         <dependency>
             <groupId>org.jboss.weld.se</groupId>
             <artifactId>weld-se-core</artifactId>
-            <version>3.0.5.Final</version>
+            <version>${weld-se-core.version}</version>
             <scope>runtime</scope>
         </dependency>
         <dependency>
             <groupId>org.flywaydb</groupId>
             <artifactId>flyway-core</artifactId>
-            <version>5.1.4</version>
+            <version>${flyway-core.version}</version>
         </dependency>
         <dependency>
             <groupId>org.apache.tomcat</groupId>
             <artifactId>tomcat-jdbc</artifactId>
-            <version>8.5.33</version>
+            <version>${tomcat-jdbc.version}</version>
         </dependency>
         <dependency>
             <groupId>javax.annotation</groupId>
             <artifactId>javax.annotation-api</artifactId>
-            <version>1.3.2</version>
+            <version>${javax.annotation-api.version}</version>
         </dependency>
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
-            <version>1.4.197</version>
+            <version>${h2.version}</version>
             <scope>runtime</scope>
         </dependency>
     </dependencies>
 
+    <properties>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+		<cdi-api.version>2.0.SP1</cdi-api.version>
+		<weld-se-core.version>3.0.5.Final</weld-se-core.version>
+		<flyway-core.version>5.1.4</flyway-core.version>
+		<tomcat-jdbc.version>8.5.33</tomcat-jdbc.version>
+		<javax.annotation-api.version>1.3.2</javax.annotation-api.version>
+		<h2.version>1.4.197</h2.version>
+    </properties>
 </project>
diff --git a/google-web-toolkit/pom.xml b/google-web-toolkit/pom.xml
index db9ce2eac0ed..214f2d1fd8d5 100644
--- a/google-web-toolkit/pom.xml
+++ b/google-web-toolkit/pom.xml
@@ -23,7 +23,7 @@
 			<dependency>
 				<groupId>com.google.gwt</groupId>
 				<artifactId>gwt</artifactId>
-				<version>2.8.2</version>
+				<version>${gwt.version}</version>
 				<type>pom</type>
 				<scope>import</scope>
 			</dependency>
@@ -49,7 +49,7 @@
 		<dependency>
 			<groupId>junit</groupId>
 			<artifactId>junit</artifactId>
-			<version>4.11</version>
+			<version>${junit.version}</version>
 			<scope>test</scope>
 		</dependency>
 	</dependencies>
@@ -120,6 +120,8 @@
 		<!-- Don't let your Mac use a crazy non-standard encoding -->
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+		<junit.version>4.11</junit.version>
+		<gwt.version>2.8.2</gwt.version>
 	</properties>
 	
 </project>
diff --git a/java-collections-maps/pom.xml b/java-collections-maps/pom.xml
index 0803866c516b..71bfa4f8bed3 100644
--- a/java-collections-maps/pom.xml
+++ b/java-collections-maps/pom.xml
@@ -39,7 +39,7 @@
         <dependency>
             <groupId>one.util</groupId>
             <artifactId>streamex</artifactId>
-            <version>0.6.5</version>
+            <version>${streamex.version}</version>
         </dependency>
     </dependencies>
 
@@ -50,5 +50,6 @@
         <avaitility.version>1.7.0</avaitility.version>
         <assertj.version>3.6.1</assertj.version>
         <eclipse.collections.version>7.1.0</eclipse.collections.version>
+		<streamex.version>0.6.5</streamex.version>
     </properties>
 </project>
diff --git a/java-streams/pom.xml b/java-streams/pom.xml
index 2b52ebb4b3d2..793fc4667695 100644
--- a/java-streams/pom.xml
+++ b/java-streams/pom.xml
@@ -94,10 +94,10 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.1</version>
+                <version>${maven-compiler-plugin.version}</version>
                 <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
                     <compilerArgument>-parameters</compilerArgument>
                 </configuration>
             </plugin>
@@ -117,5 +117,8 @@
         <!-- testing -->
         <assertj.version>3.11.1</assertj.version>
         <asspectj.version>1.8.9</asspectj.version>
+		<maven-compiler-plugin.version>3.1</maven-compiler-plugin.version>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
     </properties>
 </project>
diff --git a/java-strings/pom.xml b/java-strings/pom.xml
index 9f89ed6d76a5..4555b8ad4a87 100755
--- a/java-strings/pom.xml
+++ b/java-strings/pom.xml
@@ -66,20 +66,20 @@
         <dependency>
             <groupId>com.vdurmont</groupId>
             <artifactId>emoji-java</artifactId>
-            <version>4.0.0</version>
+            <version>${emoji-java.version}</version>
         </dependency>
 
         <dependency>
             <groupId>org.junit.jupiter</groupId>
             <artifactId>junit-jupiter-api</artifactId>
-            <version>5.3.1</version>
+            <version>${junit-jupiter-api.version}</version>
             <scope>test</scope>
         </dependency>
 
         <dependency>
             <groupId>org.hamcrest</groupId>
             <artifactId>hamcrest-library</artifactId>
-            <version>1.3</version>
+            <version>${hamcrest-library.version}</version>
             <scope>test</scope>
         </dependency>
 
@@ -87,18 +87,18 @@
         <dependency>
             <groupId>org.passay</groupId>
             <artifactId>passay</artifactId>
-            <version>1.3.1</version>
+            <version>${passay.version}</version>
         </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-text</artifactId>
-            <version>1.4</version>
+            <version>${commons-text.version}</version>
         </dependency>
 
         <dependency>
             <groupId>org.ahocorasick</groupId>
             <artifactId>ahocorasick</artifactId>
-            <version>0.4.0</version>
+            <version>${ahocorasick.version}</version>
         </dependency>
 
     </dependencies>
@@ -116,10 +116,10 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.1</version>
+                <version>${maven-compiler-plugin.version}</version>
                 <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
+                    <source>${java.version}</source>
+                    <target>${java.version}</target>
                     <compilerArgument>-parameters</compilerArgument>
                 </configuration>
             </plugin>
@@ -135,6 +135,12 @@
         <jmh-core.version>1.19</jmh-core.version>
         <icu4j.version>61.1</icu4j.version>
         <guava.version>27.0.1-jre</guava.version>
+		<emoji-java.version>4.0.0</emoji-java.version>
+		<junit-jupiter-api.version>5.3.1</junit-jupiter-api.version>
+		<hamcrest-library.version>1.3</hamcrest-library.version>
+		<passay.version>1.3.1</passay.version>
+		<commons-text.version>1.4</commons-text.version>
+		<ahocorasick.version>0.4.0</ahocorasick.version>
     </properties>
 
 </project>
diff --git a/javax-servlets/pom.xml b/javax-servlets/pom.xml
index f00dd0ebe886..bf85feb7ce17 100644
--- a/javax-servlets/pom.xml
+++ b/javax-servlets/pom.xml
@@ -80,6 +80,7 @@
             <scope>test</scope>
         </dependency>
     </dependencies>
+	
     <properties>
         <org.apache.httpcomponents.version>4.5.3</org.apache.httpcomponents.version>
         <spring-test.version>5.0.5.RELEASE</spring-test.version>
diff --git a/javaxval/pom.xml b/javaxval/pom.xml
index 5f2690b5b46d..f31aa0dc772d 100644
--- a/javaxval/pom.xml
+++ b/javaxval/pom.xml
@@ -50,6 +50,7 @@
             <scope>test</scope>
         </dependency>
     </dependencies>
+	
     <properties>
         <validation-api.version>2.0.1.Final</validation-api.version>
         <hibernate-validator.version>6.0.13.Final</hibernate-validator.version>
diff --git a/jee-7-security/pom.xml b/jee-7-security/pom.xml
index 622ca199038c..f7d96f1165e3 100644
--- a/jee-7-security/pom.xml
+++ b/jee-7-security/pom.xml
@@ -56,7 +56,7 @@
         <dependency>
             <groupId>javax.mvc</groupId>
             <artifactId>javax.mvc-api</artifactId>
-            <version>1.0-pr</version>
+            <version>${javax.mvc-api.version}</version>
         </dependency>
 
         <dependency>
@@ -97,6 +97,7 @@
         <jsp-api.version>2.2</jsp-api.version>
         <taglibs.standard.version>1.1.2</taglibs.standard.version>
         <org.springframework.security.version>4.2.3.RELEASE</org.springframework.security.version>
+		<javax.mvc-api.version>1.0-pr</javax.mvc-api.version>
     </properties>
 
 </project>
diff --git a/jee-7/pom.xml b/jee-7/pom.xml
index 97ed2cc51d14..70ca50e20079 100644
--- a/jee-7/pom.xml
+++ b/jee-7/pom.xml
@@ -128,52 +128,52 @@
 		<dependency>
 			<groupId>org.jboss.spec.javax.batch</groupId>
 			<artifactId>jboss-batch-api_1.0_spec</artifactId>
-			<version>1.0.0.Final</version>
+			<version>${jboss-batch-api.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>org.jberet</groupId>
 			<artifactId>jberet-core</artifactId>
-			<version>1.0.2.Final</version>
+			<version>${jberet-core.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>org.jberet</groupId>
 			<artifactId>jberet-support</artifactId>
-			<version>1.0.2.Final</version>
+			<version>${jberet-support.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>org.jboss.spec.javax.transaction</groupId>
 			<artifactId>jboss-transaction-api_1.2_spec</artifactId>
-			<version>1.0.0.Final</version>
+			<version>${jboss-transaction-api.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>org.jboss.marshalling</groupId>
 			<artifactId>jboss-marshalling</artifactId>
-			<version>1.4.2.Final</version>
+			<version>${jboss-marshalling.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>org.jboss.weld</groupId>
 			<artifactId>weld-core</artifactId>
-			<version>2.1.1.Final</version>
+			<version>${weld-core.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>org.jboss.weld.se</groupId>
 			<artifactId>weld-se</artifactId>
-			<version>2.1.1.Final</version>
+			<version>${weld-se.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>org.jberet</groupId>
 			<artifactId>jberet-se</artifactId>
-			<version>1.0.2.Final</version>
+			<version>${jberet-se.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>com.h2database</groupId>
 			<artifactId>h2</artifactId>
-			<version>1.4.178</version>
+			<version>${h2.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>org.glassfish.jersey.containers</groupId>
 			<artifactId>jersey-container-jetty-servlet</artifactId>
-			<version>2.22.1</version>
+			<version>${jersey-container-jetty-servlet.version}</version>
 		</dependency>
 	</dependencies>
 
@@ -533,6 +533,16 @@
 		<jstl.version>1.2</jstl.version>
 		<jsp-api.version>2.2</jsp-api.version>
 		<ozark.version>20160715</ozark.version>
+		<jboss-batch-api.version>1.0.0.Final</jboss-batch-api.version>
+		<jberet-core.version>1.0.2.Final</jberet-core.version>
+		<jberet-support.version>1.0.2.Final</jberet-support.version>
+		<jboss-transaction-api.version>1.0.0.Final</jboss-transaction-api.version>
+		<jboss-marshalling.version>1.4.2.Final</jboss-marshalling.version>
+		<weld-core.version>2.1.1.Final</weld-core.version>
+		<weld-se.version>2.1.1.Final</weld-se.version>
+		<jberet-se.version>1.0.2.Final</jberet-se.version>
+		<h2.version>1.4.178</h2.version>
+		<jersey-container-jetty-servlet.version>2.22.1</jersey-container-jetty-servlet.version>
 	</properties>
 
 </project>
\ No newline at end of file
diff --git a/jib/pom.xml b/jib/pom.xml
index ad4011c3c499..5c9f242a20a7 100644
--- a/jib/pom.xml
+++ b/jib/pom.xml
@@ -18,11 +18,7 @@
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
     </dependencies>
-
-    <properties>
-        <java.version>1.8</java.version>
-    </properties>
-
+	
     <build>
         <plugins>
             <plugin>
@@ -32,7 +28,7 @@
             <plugin>
                 <groupId>com.google.cloud.tools</groupId>
                 <artifactId>jib-maven-plugin</artifactId>
-                <version>0.9.10</version>
+                <version>${jib-maven-plugin.version}</version>
                 <configuration>
                     <to>
                         <image>registry.hub.docker.com/baeldungjib/jib-spring-boot-app</image>
@@ -42,4 +38,8 @@
         </plugins>
     </build>
 
+    <properties>
+        <java.version>1.8</java.version>
+		<jib-maven-plugin.version>0.9.10</jib-maven-plugin.version>
+    </properties>
 </project>
diff --git a/json/pom.xml b/json/pom.xml
index fce2d26db5cd..23955e5a75ce 100644
--- a/json/pom.xml
+++ b/json/pom.xml
@@ -32,17 +32,17 @@
         <dependency>
             <groupId>org.json</groupId>
             <artifactId>json</artifactId>
-            <version>20171018</version>
+            <version>${json.version}</version>
         </dependency>
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
-            <version>2.8.5</version>
+            <version>${gson.version}</version>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
-            <version>2.9.7</version>
+            <version>${jackson-databind.version}</version>
         </dependency>
 		<dependency>
             <groupId>javax.json.bind</groupId>
@@ -52,14 +52,14 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>${junit.version}</version>
             <scope>test</scope>
         </dependency>
         <!-- https://search.maven.org/search?q=g:org.glassfish%20AND%20a:javax.json&core=gav  -->
         <dependency>
             <groupId>org.glassfish</groupId>
             <artifactId>javax.json</artifactId>
-            <version>1.1.2</version>
+            <version>${javax.version}</version>
         </dependency>
 		<dependency>
 			<groupId>org.eclipse</groupId>
@@ -81,6 +81,11 @@
         <jsonb-api.version>1.0</jsonb-api.version>
         <commons-collections4.version>4.1</commons-collections4.version>
         <yasson.version>1.0.1</yasson.version>
+		<json.version>20171018</json.version>
+		<gson.version>2.8.5</gson.version>
+		<jackson-databind.version>2.9.7</jackson-databind.version>
+		<junit.version>4.12</junit.version>
+		<javax.version>1.1.2</javax.version>
     </properties>
 
 </project>
diff --git a/jta/pom.xml b/jta/pom.xml
index 4754c1872bf5..038f1dc8d1e7 100644
--- a/jta/pom.xml
+++ b/jta/pom.xml
@@ -7,7 +7,6 @@
     <version>1.0-SNAPSHOT</version>
     <name>jta</name>
     <packaging>jar</packaging>
-
     <description>JEE JTA demo</description>
 
     <parent>
@@ -17,12 +16,6 @@
         <relativePath/>
     </parent>
 
-    <properties>
-        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <java.version>1.8</java.version>
-    </properties>
-
     <dependencies>
         <dependency>
             <groupId>org.springframework.boot</groupId>
@@ -46,7 +39,7 @@
         <dependency>
             <groupId>org.hsqldb</groupId>
             <artifactId>hsqldb</artifactId>
-            <version>2.4.1</version>
+            <version>${hsqldb.version}</version>
         </dependency>
     </dependencies>
 
@@ -86,4 +79,11 @@
             </build>
         </profile>
     </profiles>
+	
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <java.version>1.8</java.version>
+		<hsqldb.version>2.4.1</hsqldb.version>
+    </properties>
 </project>
diff --git a/libraries-security/pom.xml b/libraries-security/pom.xml
index 3077abc29c57..ba51227ce0df 100644
--- a/libraries-security/pom.xml
+++ b/libraries-security/pom.xml
@@ -23,7 +23,7 @@
         <dependency>
             <groupId>org.springframework.security.oauth</groupId>
             <artifactId>spring-security-oauth2</artifactId>
-            <version>2.3.3.RELEASE</version>
+            <version>${spring-security-oauth2.version}</version>
         </dependency>
 
         <dependency>
@@ -41,21 +41,21 @@
         <dependency>
             <groupId>org.passay</groupId>
             <artifactId>passay</artifactId>
-            <version>1.3.1</version>
+            <version>${passay.version}</version>
         </dependency>
         <dependency>
             <groupId>org.cryptacular</groupId>
             <artifactId>cryptacular</artifactId>
-            <version>1.2.2</version>
+            <version>${cryptacular.version}</version>
         </dependency>
-
     </dependencies>
 
     <properties>
         <junit.version>4.12</junit.version>
         <spring-boot-maven-plugin.version>2.0.4.RELEASE</spring-boot-maven-plugin.version>
         <scribejava.version>5.6.0</scribejava.version>
+		<spring-security-oauth2.version>2.3.3.RELEASE</spring-security-oauth2.version>
+		<passay.version>1.3.1</passay.version>
+		<cryptacular.version>1.2.2</cryptacular.version>
     </properties>
-
-
 </project>
diff --git a/libraries-server/pom.xml b/libraries-server/pom.xml
index f60e664fa767..ea556baece8e 100644
--- a/libraries-server/pom.xml
+++ b/libraries-server/pom.xml
@@ -14,7 +14,7 @@
         <dependency>
             <groupId>org.eclipse.paho</groupId>
             <artifactId>org.eclipse.paho.client.mqttv3</artifactId>
-            <version>1.2.0</version>
+            <version>${eclipse.paho.client.mqttv3.version}</version>
         </dependency>
         <!-- https://mvnrepository.com/artifact/org.assertj/assertj-core -->
         <dependency>
@@ -107,6 +107,7 @@
         <junit.version>4.12</junit.version>
         <tomcat.version>8.5.24</tomcat.version>
         <smack.version>4.3.1</smack.version>
+		<eclipse.paho.client.mqttv3.version>1.2.0</eclipse.paho.client.mqttv3.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/lombok-custom/pom.xml b/lombok-custom/pom.xml
index 41bd042a5e71..629d1b7c4835 100644
--- a/lombok-custom/pom.xml
+++ b/lombok-custom/pom.xml
@@ -2,34 +2,35 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-    <parent>
-        <artifactId>parent-modules</artifactId>
-        <groupId>com.baeldung</groupId>
-        <version>1.0.0-SNAPSHOT</version>
-    </parent>
 
     <modelVersion>4.0.0</modelVersion>
     <artifactId>lombok-custom</artifactId>
     <version>0.1-SNAPSHOT</version>
 
+    <parent>
+        <artifactId>parent-modules</artifactId>
+        <groupId>com.baeldung</groupId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+	
     <dependencies>
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
-            <version>1.14.8</version>
+            <version>${lombok.version}</version>
             <scope>provided</scope>
         </dependency>
 
         <dependency>
             <groupId>org.kohsuke.metainf-services</groupId>
             <artifactId>metainf-services</artifactId>
-            <version>1.8</version>
+            <version>${metainf-services.version}</version>
         </dependency>
 
         <dependency>
             <groupId>org.eclipse.jdt</groupId>
             <artifactId>core</artifactId>
-            <version>3.3.0-v_771</version>
+            <version>${eclipse.jdt.core.version}</version>
         </dependency>
     </dependencies>
 
@@ -54,5 +55,12 @@
         </profile>
     </profiles>
 
+    <properties>
+        <!-- lombok: https://projectlombok.org/changelog.html -->
+        <lombok.version>1.18.4</lombok.version>
+		<metainf-services.version>1.8</metainf-services.version>
+		<eclipse.jdt.core.version>3.3.0-v_771</eclipse.jdt.core.version>
+    </properties>
+
 
 </project>
\ No newline at end of file
diff --git a/metrics/pom.xml b/metrics/pom.xml
index d7d7a8a911ea..014931a9574c 100644
--- a/metrics/pom.xml
+++ b/metrics/pom.xml
@@ -66,7 +66,7 @@
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
-            <version>2.0.7.RELEASE</version>
+            <version>${spring-boot-starter-web.version}</version>
         </dependency>
 
         <dependency>
@@ -89,7 +89,7 @@
         <dependency>
             <groupId>org.assertj</groupId>
             <artifactId>assertj-core</artifactId>
-            <version>3.11.1</version>
+            <version>${assertj-core.version}</version>
             <scope>test</scope>
         </dependency>
 
@@ -102,6 +102,8 @@
         <micrometer.ver>0.12.0.RELEASE</micrometer.ver>
         <fasterxml.jackson.version>2.9.1</fasterxml.jackson.version>
         <spectator-api.version>0.57.1</spectator-api.version>
+		<spring-boot-starter-web.version>2.0.7.RELEASE</spring-boot-starter-web.version>
+		<assertj-core.version>3.11.1</assertj-core.version>
     </properties>
 
 </project>
diff --git a/persistence-modules/spring-data-mongodb/pom.xml b/persistence-modules/spring-data-mongodb/pom.xml
index c1faf721039d..7156cdf0712b 100644
--- a/persistence-modules/spring-data-mongodb/pom.xml
+++ b/persistence-modules/spring-data-mongodb/pom.xml
@@ -23,7 +23,6 @@
             <artifactId>spring-data-releasetrain</artifactId>
             <version>Lovelace-SR3</version>
             <type>pom</type>
-            <scope>import</scope>
         </dependency>
 
         <dependency>
diff --git a/restx/pom.xml b/restx/pom.xml
index c6233b968c93..f33d490096f1 100644
--- a/restx/pom.xml
+++ b/restx/pom.xml
@@ -3,17 +3,10 @@
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
-
     <artifactId>restx</artifactId>
     <version>0.1-SNAPSHOT</version>
     <packaging>war</packaging>
     <name>restx-demo</name>
-
-    <properties>
-        <maven.compiler.target>1.8</maven.compiler.target>
-        <maven.compiler.source>1.8</maven.compiler.source>
-        <restx.version>0.35-rc4</restx.version>
-    </properties>
 	
 	<parent>
         <groupId>com.baeldung</groupId>
@@ -106,7 +99,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.0.13</version>
+            <version>${logback-classic.version}</version>
         </dependency>
         <dependency>
             <groupId>io.restx</groupId>
@@ -117,10 +110,11 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.11</version>
+            <version>${junit.version}</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
+	
     <build>
         <plugins>
             <plugin>
@@ -152,4 +146,11 @@
             </plugin>
         </plugins>
     </build>
+
+    <properties>
+        <maven.compiler.target>1.8</maven.compiler.target>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <restx.version>0.35-rc4</restx.version>
+		<logback-classic.version>1.0.13</logback-classic.version>
+    </properties>
 </project>
diff --git a/rsocket/pom.xml b/rsocket/pom.xml
index 8b04a3158391..c00791bfd885 100644
--- a/rsocket/pom.xml
+++ b/rsocket/pom.xml
@@ -4,51 +4,63 @@
     <artifactId>rsocket</artifactId>
     <version>0.0.1-SNAPSHOT</version>
     <name>rsocket</name>
+    <packaging>jar</packaging>
 
-		<parent>
+    <parent>
         <groupId>com.baeldung</groupId>
         <artifactId>parent-modules</artifactId>
         <version>1.0.0-SNAPSHOT</version>
     </parent>
-    <packaging>jar</packaging>
 
-		<dependencies>
+    <dependencies>
         <dependency>
             <groupId>io.rsocket</groupId>
             <artifactId>rsocket-core</artifactId>
-            <version>0.11.13</version>
+            <version>${rsocket-core.version}</version>
         </dependency>
         <dependency>
             <groupId>io.rsocket</groupId>
             <artifactId>rsocket-transport-netty</artifactId>
-            <version>0.11.13</version>
+            <version>${rsocket-transport-netty}</version>
         </dependency>
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>${junit.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.hamcrest</groupId>
             <artifactId>hamcrest-core</artifactId>
-            <version>1.3</version>
+            <version>${hamcrest-core.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.2.3</version>
+            <version>${logback-classic.version}</version>
         </dependency>
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-core</artifactId>
-            <version>1.2.3</version>
+            <version>${logback-core.version}</version>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>
-            <version>1.7.25</version>
+            <version>${slf4j-api.version}</version>
         </dependency>
     </dependencies>
+
+    <properties>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+        <archetype-packaging.version>3.0.1</archetype-packaging.version>
+		<rsocket-core.version>0.11.13</rsocket-core.version>
+		<rsocket-transport-netty>0.11.13</rsocket-transport-netty>
+		<hamcrest-core.version>1.3</hamcrest-core.version>
+		<logback-classic.version>1.2.3</logback-classic.version>
+		<logback-core.version>1.2.3</logback-core.version>
+		<slf4j-api.version>1.7.25</slf4j-api.version>
+    </properties>
 </project>
\ No newline at end of file
diff --git a/spring-5-reactive-client/pom.xml b/spring-5-reactive-client/pom.xml
index 6e39743ed0c9..bcf04046a732 100644
--- a/spring-5-reactive-client/pom.xml
+++ b/spring-5-reactive-client/pom.xml
@@ -2,7 +2,6 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
-
     <artifactId>spring-5-reactive-client</artifactId>
     <packaging>jar</packaging>
     <name>spring-5-reactive-client</name>
diff --git a/spring-5-reactive-oauth/pom.xml b/spring-5-reactive-oauth/pom.xml
index 73809681f284..7062372ea159 100644
--- a/spring-5-reactive-oauth/pom.xml
+++ b/spring-5-reactive-oauth/pom.xml
@@ -2,12 +2,10 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
-
 	<groupId>com.baeldung.reactive.oauth</groupId>
 	<artifactId>spring-5-reactive-oauth</artifactId>
 	<version>1.0.0-SNAPSHOT</version>
 	<packaging>jar</packaging>
-
 	<name>spring-5-reactive-oauth</name>
 	<description>WebFluc and Spring Security OAuth </description>
 
@@ -18,12 +16,6 @@
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 
-	<properties>
-		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-		<java.version>1.8</java.version>
-	</properties>
-
 	<dependencies>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
@@ -74,4 +66,10 @@
 		</plugins>
 	</build>
 
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+		<java.version>1.8</java.version>
+	</properties>
+
 </project>
diff --git a/spring-5-reactive-security/pom.xml b/spring-5-reactive-security/pom.xml
index 3b64b9b3ac8d..0ff1dc0076b3 100644
--- a/spring-5-reactive-security/pom.xml
+++ b/spring-5-reactive-security/pom.xml
@@ -2,7 +2,6 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
-
     <groupId>com.baeldung</groupId>
     <artifactId>spring-5-reactive-security</artifactId>
     <version>0.0.1-SNAPSHOT</version>
diff --git a/spring-5-security/pom.xml b/spring-5-security/pom.xml
index c26e37038103..ae9e1fb0c5dd 100644
--- a/spring-5-security/pom.xml
+++ b/spring-5-security/pom.xml
@@ -16,7 +16,6 @@
     </parent>
 
     <dependencies>
-
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-security</artifactId>
diff --git a/spring-all/pom.xml b/spring-all/pom.xml
index 77c7e74e084a..5872fbdac5ff 100644
--- a/spring-all/pom.xml
+++ b/spring-all/pom.xml
@@ -160,12 +160,12 @@
         <dependency>
             <groupId>net.javacrumbs.shedlock</groupId>
             <artifactId>shedlock-spring</artifactId>
-            <version>2.1.0</version>
+            <version>${shedlock.version}</version>
         </dependency>
         <dependency>
             <groupId>net.javacrumbs.shedlock</groupId>
             <artifactId>shedlock-provider-jdbc-template</artifactId>
-            <version>2.1.0</version>
+            <version>${shedlock.version}</version>
         </dependency>
     </dependencies>
 
@@ -243,7 +243,7 @@
         <easymock.version>3.6</easymock.version>
         <assertj.version>3.6.1</assertj.version>
         <jasperreports.version>6.6.0</jasperreports.version>
-
+        <shedlock.version>2.1.0</shedlock.version>
         <javassist.version>3.22.0-GA</javassist.version>
     </properties>
 
diff --git a/spring-boot-angular-ecommerce/pom.xml b/spring-boot-angular-ecommerce/pom.xml
index dc92a91d028d..8e476b9d5bff 100644
--- a/spring-boot-angular-ecommerce/pom.xml
+++ b/spring-boot-angular-ecommerce/pom.xml
@@ -2,11 +2,9 @@
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
-
     <artifactId>spring-boot-angular-ecommerce</artifactId>
     <version>0.0.1-SNAPSHOT</version>
     <packaging>jar</packaging>
-
     <name>spring-boot-angular-ecommerce</name>
     <description>Spring Boot Angular E-commerce Appliciation</description>
 
diff --git a/spring-boot-libraries/pom.xml b/spring-boot-libraries/pom.xml
index 66aa66bdfd05..f21a71de2403 100644
--- a/spring-boot-libraries/pom.xml
+++ b/spring-boot-libraries/pom.xml
@@ -44,12 +44,12 @@
 		<dependency>
 			<groupId>net.javacrumbs.shedlock</groupId>
 			<artifactId>shedlock-spring</artifactId>
-			<version>2.1.0</version>
+			<version>${shedlock.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>net.javacrumbs.shedlock</groupId>
 			<artifactId>shedlock-provider-jdbc-template</artifactId>
-			<version>2.1.0</version>
+			<version>${shedlock.version}</version>
 		</dependency>
 
 	</dependencies>
@@ -151,6 +151,7 @@
 		<git-commit-id-plugin.version>2.2.4</git-commit-id-plugin.version>
 		<modelmapper.version>2.3.2</modelmapper.version>
 		<problem-spring-web.version>0.23.0</problem-spring-web.version>
+		<shedlock.version>2.1.0</shedlock.version>
 	</properties>
 
 </project>
diff --git a/spring-boot-logging-log4j2/pom.xml b/spring-boot-logging-log4j2/pom.xml
index ad678a14cf7f..d3a84de342ab 100644
--- a/spring-boot-logging-log4j2/pom.xml
+++ b/spring-boot-logging-log4j2/pom.xml
@@ -40,12 +40,12 @@
             <!-- forcing spring boot 1.x sing log4j was dropped in spring boot 1.4 and beyond -->
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-log4j</artifactId>
-            <version>1.3.8.RELEASE</version>
+            <version>${spring-boot-starter-log4j.version}</version>
         </dependency>
         <dependency>
             <groupId>org.graylog2</groupId>
             <artifactId>gelfj</artifactId>
-            <version>1.1.16</version>
+            <version>${gelfj.version}</version>
             <scope>compile</scope>
         </dependency>
     </dependencies>
@@ -71,5 +71,7 @@
     
     <properties>
         <start-class>com.baeldung.springbootlogging.SpringBootLoggingApplication</start-class>
+		<spring-boot-starter-log4j.version>1.3.8.RELEASE</spring-boot-starter-log4j.version>
+		<gelfj.version>1.1.16</gelfj.version>
     </properties>
 </project>