diff --git a/modules/commons/pom.xml b/modules/commons/pom.xml
index 70ea76bad3..041575fbf8 100644
--- a/modules/commons/pom.xml
+++ b/modules/commons/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>Apache-Synapse</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/core/pom.xml b/modules/core/pom.xml
index 8902089844..1dccfaabe7 100644
--- a/modules/core/pom.xml
+++ b/modules/core/pom.xml
@@ -16,7 +16,7 @@
 	<parent>
 		<groupId>org.apache.synapse</groupId>
 		<artifactId>Apache-Synapse</artifactId>
-		<version>4.0.0-wso2v65</version>
+		<version>4.0.0-wso2v66-SNAPSHOT</version>
 		<relativePath>../../pom.xml</relativePath>
 	</parent>
 
diff --git a/modules/coverage-report/pom.xml b/modules/coverage-report/pom.xml
index a6d6c9e095..37441aa39d 100644
--- a/modules/coverage-report/pom.xml
+++ b/modules/coverage-report/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>Apache-Synapse</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/distribution/pom.xml b/modules/distribution/pom.xml
index 4481f6095b..c27db305c9 100644
--- a/modules/distribution/pom.xml
+++ b/modules/distribution/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>Apache-Synapse</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/experimental/pom.xml b/modules/experimental/pom.xml
index b7babbc894..f43eae3722 100644
--- a/modules/experimental/pom.xml
+++ b/modules/experimental/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>Apache-Synapse</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/extensions/pom.xml b/modules/extensions/pom.xml
index 579b0cb7a0..98035aa77d 100644
--- a/modules/extensions/pom.xml
+++ b/modules/extensions/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>Apache-Synapse</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/features/org.apache.synapse.samples.feature/pom.xml b/modules/features/org.apache.synapse.samples.feature/pom.xml
index 813939c8bb..0d6f92e1fa 100644
--- a/modules/features/org.apache.synapse.samples.feature/pom.xml
+++ b/modules/features/org.apache.synapse.samples.feature/pom.xml
@@ -19,7 +19,7 @@
 
     <parent>
         <artifactId>synapse-features</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <groupId>org.apache.synapse</groupId>
     </parent>
 
diff --git a/modules/features/org.apache.synapse.transport.fix.feature/pom.xml b/modules/features/org.apache.synapse.transport.fix.feature/pom.xml
index 6f36c160e2..b85c33f054 100644
--- a/modules/features/org.apache.synapse.transport.fix.feature/pom.xml
+++ b/modules/features/org.apache.synapse.transport.fix.feature/pom.xml
@@ -19,7 +19,7 @@
 
     <parent>
         <artifactId>synapse-features</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <groupId>org.apache.synapse</groupId>
     </parent>
 
diff --git a/modules/features/org.apache.synapse.transport.nhttp.feature/pom.xml b/modules/features/org.apache.synapse.transport.nhttp.feature/pom.xml
index 906e8d8b98..9d96a0cebd 100644
--- a/modules/features/org.apache.synapse.transport.nhttp.feature/pom.xml
+++ b/modules/features/org.apache.synapse.transport.nhttp.feature/pom.xml
@@ -19,7 +19,7 @@
 
     <parent>
         <artifactId>synapse-features</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <groupId>org.apache.synapse</groupId>
     </parent>
 
diff --git a/modules/features/org.apache.synapse.transport.vfs.feature/pom.xml b/modules/features/org.apache.synapse.transport.vfs.feature/pom.xml
index 6722c2486b..5136b871ed 100644
--- a/modules/features/org.apache.synapse.transport.vfs.feature/pom.xml
+++ b/modules/features/org.apache.synapse.transport.vfs.feature/pom.xml
@@ -19,7 +19,7 @@
 
     <parent>
         <artifactId>synapse-features</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <groupId>org.apache.synapse</groupId>
     </parent>
 
diff --git a/modules/features/org.apache.synapse.transport.vfs.smb.feature/pom.xml b/modules/features/org.apache.synapse.transport.vfs.smb.feature/pom.xml
index e48b41f7d6..28664094f3 100644
--- a/modules/features/org.apache.synapse.transport.vfs.smb.feature/pom.xml
+++ b/modules/features/org.apache.synapse.transport.vfs.smb.feature/pom.xml
@@ -19,7 +19,7 @@
 
     <parent>
         <artifactId>synapse-features</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <groupId>org.apache.synapse</groupId>
     </parent>
 
diff --git a/modules/features/org.apache.synapse.transport.vfs.smb2.feature/pom.xml b/modules/features/org.apache.synapse.transport.vfs.smb2.feature/pom.xml
index 50ad246e4d..13fd6ba680 100644
--- a/modules/features/org.apache.synapse.transport.vfs.smb2.feature/pom.xml
+++ b/modules/features/org.apache.synapse.transport.vfs.smb2.feature/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <artifactId>synapse-features</artifactId>
         <groupId>org.apache.synapse</groupId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>
diff --git a/modules/features/org.apache.synapse.wso2.feature/pom.xml b/modules/features/org.apache.synapse.wso2.feature/pom.xml
index 03fa93eaae..ff66a14fb3 100644
--- a/modules/features/org.apache.synapse.wso2.feature/pom.xml
+++ b/modules/features/org.apache.synapse.wso2.feature/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <artifactId>synapse-features</artifactId>
         <groupId>org.apache.synapse</groupId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>
diff --git a/modules/features/pom.xml b/modules/features/pom.xml
index 24338ca92a..5e79339e9b 100644
--- a/modules/features/pom.xml
+++ b/modules/features/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>Apache-Synapse</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/handler/pom.xml b/modules/handler/pom.xml
index 9125f97324..3d6a6e91ea 100644
--- a/modules/handler/pom.xml
+++ b/modules/handler/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>Apache-Synapse</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/integration/pom.xml b/modules/integration/pom.xml
index 9941d9f920..74d4d36b98 100644
--- a/modules/integration/pom.xml
+++ b/modules/integration/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>Apache-Synapse</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
@@ -37,7 +37,7 @@
         <connection>scm:svn:http://svn.apache.org/repos/asf/synapse/trunk/java/modules/integration</connection>
         <developerConnection>scm:svn:https://svn.apache.org/repos/asf/synapse/trunk/java/modules/integration</developerConnection>
         <url>http://svn.apache.org/viewvc/synapse/trunk/java/modules/integration</url>
-      <tag>v4.0.0-wso2v65</tag>
+      <tag>HEAD</tag>
   </scm>
 
     <build>
diff --git a/modules/migrator/pom.xml b/modules/migrator/pom.xml
index 0f175e3cdb..b4b4067435 100644
--- a/modules/migrator/pom.xml
+++ b/modules/migrator/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>Apache-Synapse</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/packaging/package-archetype/pom.xml b/modules/packaging/package-archetype/pom.xml
index 155ff6ec5e..7071e49f48 100644
--- a/modules/packaging/package-archetype/pom.xml
+++ b/modules/packaging/package-archetype/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>Apache-Synapse</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../../pom.xml</relativePath>
     </parent>
     <artifactId>synapse-package-archetype</artifactId>
diff --git a/modules/packaging/package-skeleton/pom.xml b/modules/packaging/package-skeleton/pom.xml
index 3096e5951b..0e5a6b0386 100644
--- a/modules/packaging/package-skeleton/pom.xml
+++ b/modules/packaging/package-skeleton/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>Apache-Synapse</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../../pom.xml</relativePath>
     </parent>
     <artifactId>synapse-package-skeleton</artifactId>
diff --git a/modules/patches/pom.xml b/modules/patches/pom.xml
index 4a053d9307..12a5974694 100644
--- a/modules/patches/pom.xml
+++ b/modules/patches/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>Apache-Synapse</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <artifactId>synapse-patches</artifactId>
diff --git a/modules/samples/pom.xml b/modules/samples/pom.xml
index 701e084d57..2de5cca11e 100644
--- a/modules/samples/pom.xml
+++ b/modules/samples/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>Apache-Synapse</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/securevault/pom.xml b/modules/securevault/pom.xml
index fba063e68c..857607d789 100644
--- a/modules/securevault/pom.xml
+++ b/modules/securevault/pom.xml
@@ -24,7 +24,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>Apache-Synapse</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <groupId>org.apache.synapse</groupId>
diff --git a/modules/tasks/pom.xml b/modules/tasks/pom.xml
index cf6a3d7e3c..d010b4fd1e 100644
--- a/modules/tasks/pom.xml
+++ b/modules/tasks/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>Apache-Synapse</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/transports/core/nhttp/pom.xml b/modules/transports/core/nhttp/pom.xml
index 0fb9b4a02a..8415549a89 100644
--- a/modules/transports/core/nhttp/pom.xml
+++ b/modules/transports/core/nhttp/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>synapse-transports</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/transports/core/pipe/pom.xml b/modules/transports/core/pipe/pom.xml
index ff9c093b0d..d9f3b859bd 100644
--- a/modules/transports/core/pipe/pom.xml
+++ b/modules/transports/core/pipe/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>synapse-transports</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/transports/core/vfs/pom.xml b/modules/transports/core/vfs/pom.xml
index bae24713eb..810d969d0c 100644
--- a/modules/transports/core/vfs/pom.xml
+++ b/modules/transports/core/vfs/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>synapse-transports</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/transports/optional/fix/pom.xml b/modules/transports/optional/fix/pom.xml
index 294270b099..74bbe44e66 100644
--- a/modules/transports/optional/fix/pom.xml
+++ b/modules/transports/optional/fix/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>synapse-transports</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/transports/pom.xml b/modules/transports/pom.xml
index bd48ab5f82..2e1ec1db98 100644
--- a/modules/transports/pom.xml
+++ b/modules/transports/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>Apache-Synapse</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/war/pom.xml b/modules/war/pom.xml
index cc1c93f6c7..7f06a43b3c 100644
--- a/modules/war/pom.xml
+++ b/modules/war/pom.xml
@@ -23,7 +23,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>Apache-Synapse</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/xar-maven-plugin/pom.xml b/modules/xar-maven-plugin/pom.xml
index ea4797d19b..4827d428b6 100644
--- a/modules/xar-maven-plugin/pom.xml
+++ b/modules/xar-maven-plugin/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.apache.synapse</groupId>
         <artifactId>Apache-Synapse</artifactId>
-        <version>4.0.0-wso2v65</version>
+        <version>4.0.0-wso2v66-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <groupId>org.apache.synapse</groupId>
diff --git a/pom.xml b/pom.xml
index 314a537ff2..07d87134d0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,7 +26,7 @@
    </parent>
    <groupId>org.apache.synapse</groupId>
    <artifactId>Apache-Synapse</artifactId>
-   <version>4.0.0-wso2v65</version>
+   <version>4.0.0-wso2v66-SNAPSHOT</version>
    <name>Apache Synapse</name>
    <description>Apache Synapse</description>
    <packaging>pom</packaging>
@@ -69,7 +69,7 @@
       <connection>scm:git:https://github.com/wso2/wso2-synapse.git</connection>
       <developerConnection>scm:git:https://github.com/wso2/wso2-synapse.git</developerConnection>
       <url>https://github.com/wso2/wso2-synapse.git/</url>
-      <tag>v4.0.0-wso2v65</tag>
+      <tag>HEAD</tag>
    </scm>
    <organization>
       <name>Apache Software Foundation</name>