diff --git a/modules/commons/pom.xml b/modules/commons/pom.xml
index 49e462b9ee..ac5e7c7c7c 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-wso2v50</version>
+        <version>4.0.0-wso2v51-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/core/pom.xml b/modules/core/pom.xml
index dec8e7948e..21983365f3 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-wso2v50</version>
+		<version>4.0.0-wso2v51-SNAPSHOT</version>
 		<relativePath>../../pom.xml</relativePath>
 	</parent>
 
diff --git a/modules/coverage-report/pom.xml b/modules/coverage-report/pom.xml
index 186af94b7c..0ef791fd0e 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-wso2v50</version>
+        <version>4.0.0-wso2v51-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/distribution/pom.xml b/modules/distribution/pom.xml
index 7a657d18dd..8993c4eebf 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-wso2v50</version>
+        <version>4.0.0-wso2v51-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/experimental/pom.xml b/modules/experimental/pom.xml
index 4bd1ef6a6d..40ef1dd188 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-wso2v50</version>
+        <version>4.0.0-wso2v51-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/extensions/pom.xml b/modules/extensions/pom.xml
index 19e52a48ab..50401db359 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-wso2v50</version>
+        <version>4.0.0-wso2v51-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 85af2ae753..e557b27a4b 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-wso2v50</version>
+        <version>4.0.0-wso2v51-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 5269321d0a..e9868e606b 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-wso2v50</version>
+        <version>4.0.0-wso2v51-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 0a5785fd68..a5f4d29112 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-wso2v50</version>
+        <version>4.0.0-wso2v51-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 d361dd8505..ddc72b1514 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-wso2v50</version>
+        <version>4.0.0-wso2v51-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 2c08a6518e..8df7f7c0da 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-wso2v50</version>
+        <version>4.0.0-wso2v51-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 b928f7b4a0..0848a6562e 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-wso2v50</version>
+        <version>4.0.0-wso2v51-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 56eabd13d8..fadeb385a9 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-wso2v50</version>
+        <version>4.0.0-wso2v51-SNAPSHOT</version>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>
diff --git a/modules/features/pom.xml b/modules/features/pom.xml
index 1354fd9365..73ca4a277d 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-wso2v50</version>
+        <version>4.0.0-wso2v51-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/handler/pom.xml b/modules/handler/pom.xml
index 941914b519..79d7daecf0 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-wso2v50</version>
+        <version>4.0.0-wso2v51-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/integration/pom.xml b/modules/integration/pom.xml
index 698cae21db..99c9f6d344 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-wso2v50</version>
+        <version>4.0.0-wso2v51-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-wso2v50</tag>
+      <tag>HEAD</tag>
   </scm>
 
     <build>
diff --git a/modules/migrator/pom.xml b/modules/migrator/pom.xml
index e6d79f03a9..1fb736b0d8 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-wso2v50</version>
+        <version>4.0.0-wso2v51-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/packaging/package-archetype/pom.xml b/modules/packaging/package-archetype/pom.xml
index 62c55efde3..c25714a934 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-wso2v50</version>
+        <version>4.0.0-wso2v51-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 1d0d3238c1..cdd62963e0 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-wso2v50</version>
+        <version>4.0.0-wso2v51-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 0c1080e9d6..ad96cd2d88 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-wso2v50</version>
+        <version>4.0.0-wso2v51-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <artifactId>synapse-patches</artifactId>
diff --git a/modules/samples/pom.xml b/modules/samples/pom.xml
index 02f379bbed..fa27b9e648 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-wso2v50</version>
+        <version>4.0.0-wso2v51-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/securevault/pom.xml b/modules/securevault/pom.xml
index d72657315e..d768fe6183 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-wso2v50</version>
+        <version>4.0.0-wso2v51-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 0001d3a2cd..225c124808 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-wso2v50</version>
+        <version>4.0.0-wso2v51-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/transports/core/nhttp/pom.xml b/modules/transports/core/nhttp/pom.xml
index 922c1aa707..e904c7888d 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-wso2v50</version>
+        <version>4.0.0-wso2v51-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/transports/core/pipe/pom.xml b/modules/transports/core/pipe/pom.xml
index 133f02710e..0d102e35e7 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-wso2v50</version>
+        <version>4.0.0-wso2v51-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/transports/core/vfs/pom.xml b/modules/transports/core/vfs/pom.xml
index 0c17add7bf..3b198f645b 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-wso2v50</version>
+        <version>4.0.0-wso2v51-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/transports/optional/fix/pom.xml b/modules/transports/optional/fix/pom.xml
index 4f9896a8f7..482a502d8b 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-wso2v50</version>
+        <version>4.0.0-wso2v51-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/transports/pom.xml b/modules/transports/pom.xml
index 2dd594bd26..faa6bc7ecd 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-wso2v50</version>
+        <version>4.0.0-wso2v51-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/war/pom.xml b/modules/war/pom.xml
index ae523d2686..17c25de05e 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-wso2v50</version>
+        <version>4.0.0-wso2v51-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/xar-maven-plugin/pom.xml b/modules/xar-maven-plugin/pom.xml
index c9d6aa7707..406c0b52d4 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-wso2v50</version>
+        <version>4.0.0-wso2v51-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <groupId>org.apache.synapse</groupId>
diff --git a/pom.xml b/pom.xml
index f603be05d3..0617b6cc3b 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-wso2v50</version>
+   <version>4.0.0-wso2v51-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-wso2v50</tag>
+      <tag>HEAD</tag>
    </scm>
    <organization>
       <name>Apache Software Foundation</name>