diff --git a/samples/build-cache/app/pom.xml b/samples/build-cache/app/pom.xml
index 3a6f24ba0..2906a93a6 100644
--- a/samples/build-cache/app/pom.xml
+++ b/samples/build-cache/app/pom.xml
@@ -11,7 +11,7 @@
 
   <properties>
     <!-- Avoid docker build cache invalidation due to new commits -->
-    <project.build.outputTimestamp>1970-01-01T00:00:00Z</project.build.outputTimestamp>
+    <project.build.outputTimestamp>2000-01-01T00:00:00Z</project.build.outputTimestamp>
   </properties>
 
   <dependencies>
diff --git a/samples/build-cache/image/pom.xml b/samples/build-cache/image/pom.xml
index 04af1b9e3..acd7a1deb 100644
--- a/samples/build-cache/image/pom.xml
+++ b/samples/build-cache/image/pom.xml
@@ -17,7 +17,7 @@
 
     <image>fabric8/dmp-sample-build-cache-app:${project.version}</image>
     <!-- Avoid docker build cache invalidation due to new commits -->
-    <project.build.outputTimestamp>1970-01-01T00:00:00Z</project.build.outputTimestamp>
+    <project.build.outputTimestamp>2000-01-01T00:00:00Z</project.build.outputTimestamp>
     <tini.sha512>8053cc21a3a9bdd6042a495349d1856ae8d3b3e7664c9654198de0087af031f5d41139ec85a2f5d7d2febd22ec3f280767ff23b9d5f63d490584e2b7ad3c218c</tini.sha512>
 
     <tini.version>0.19.0</tini.version>
diff --git a/samples/build-cache/pom.xml b/samples/build-cache/pom.xml
index fe1e17bd3..bb78d6897 100644
--- a/samples/build-cache/pom.xml
+++ b/samples/build-cache/pom.xml
@@ -26,7 +26,7 @@
     <git-commit-id-plugin.version>4.0.3</git-commit-id-plugin.version>
 
     <git.commit.dateFormat>yyyy-MM-dd'T'HH:mm:ssXXX</git.commit.dateFormat>
-    <maven-assembly-plugin.version>3.3.0</maven-assembly-plugin.version>
+    <maven-assembly-plugin.version>3.5.0</maven-assembly-plugin.version>
     <maven-jar-plugin.version>3.2.0</maven-jar-plugin.version>
     <maven.compiler.source>1.8</maven.compiler.source>
     <maven.compiler.target>1.8</maven.compiler.target>