diff --git a/cli/pom.xml b/cli/pom.xml
index fa42010856c88f01d3da0b9d348797a013f8cd7e..f9ed6134a49d10dc1e96c02eebbfec7cef082304 100644
--- a/cli/pom.xml
+++ b/cli/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <artifactId>pom</artifactId>
     <groupId>org.jenkins-ci.main</groupId>
-    <version>1.420</version>
+    <version>1.421-SNAPSHOT</version>
   </parent>
   <artifactId>cli</artifactId>
   <name>Jenkins CLI</name>
diff --git a/core/pom.xml b/core/pom.xml
index 9b403bfce12a8ee12d410315c22bd6b6557275f3..1ea9311459ac941852be676a60dd679ad48a648a 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -28,7 +28,7 @@ THE SOFTWARE.
   <parent>
     <groupId>org.jenkins-ci.main</groupId>
     <artifactId>pom</artifactId>
-    <version>1.420</version>
+    <version>1.421-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/maven-plugin/pom.xml b/maven-plugin/pom.xml
index 13b88051ac437e3d861079810492c9d37e86df65..a1c5c746c2efabdfb02809afa9edb8a4da721728 100644
--- a/maven-plugin/pom.xml
+++ b/maven-plugin/pom.xml
@@ -28,7 +28,7 @@ THE SOFTWARE.
   <parent>
     <groupId>org.jenkins-ci.main</groupId>
     <artifactId>pom</artifactId>
-    <version>1.420</version>
+    <version>1.421-SNAPSHOT</version>
   </parent>
 
   <artifactId>maven-plugin</artifactId>
diff --git a/pom.xml b/pom.xml
index dc6497b33f1d6bea1a27d97327df4c647c955aad..802b8cb96b36a0e37e1b9eb34bba798ecfe83571 100644
--- a/pom.xml
+++ b/pom.xml
@@ -32,7 +32,7 @@ THE SOFTWARE.
   
   <groupId>org.jenkins-ci.main</groupId>
   <artifactId>pom</artifactId>
-  <version>1.420</version>
+  <version>1.421-SNAPSHOT</version>
   <packaging>pom</packaging>
   
   <name>Jenkins main module</name>
diff --git a/remoting/pom.xml b/remoting/pom.xml
index edbbbcb57f74acc0eb48332593b4f976d81dffe5..ae78a71e9dbd96d9d670d67d0e211259b3a420e1 100644
--- a/remoting/pom.xml
+++ b/remoting/pom.xml
@@ -27,7 +27,7 @@ THE SOFTWARE.
   <parent>
     <groupId>org.jenkins-ci.main</groupId>
     <artifactId>pom</artifactId>
-    <version>1.420</version>
+    <version>1.421-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
   
diff --git a/test/pom.xml b/test/pom.xml
index 9bd48137654a9e2c6a54ec8f9fee6f0740273dd8..087bca55725e397d5902587740d45258a23552f6 100644
--- a/test/pom.xml
+++ b/test/pom.xml
@@ -27,7 +27,7 @@ THE SOFTWARE.
   <parent>
     <artifactId>pom</artifactId>
     <groupId>org.jenkins-ci.main</groupId>
-    <version>1.420</version>
+    <version>1.421-SNAPSHOT</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.jenkins-ci.main</groupId>
diff --git a/ui-samples-plugin/pom.xml b/ui-samples-plugin/pom.xml
index efbc6a2c82940705e6e973d55ddf344e641325eb..c5e8e305469bf5be28c6e00cbb3bb00d68a76ca7 100644
--- a/ui-samples-plugin/pom.xml
+++ b/ui-samples-plugin/pom.xml
@@ -28,7 +28,7 @@ THE SOFTWARE.
   <parent>
     <groupId>org.jenkins-ci.main</groupId>
     <artifactId>pom</artifactId>
-    <version>1.420</version>
+    <version>1.421-SNAPSHOT</version>
   </parent>
 
   <artifactId>ui-samples-plugin</artifactId>
diff --git a/war/pom.xml b/war/pom.xml
index 4f1a39593d40869e3b0b3c97e6c8a794c017ac9e..ceb4c02c48997bd43a234a0813098d07c2fe08d4 100644
--- a/war/pom.xml
+++ b/war/pom.xml
@@ -27,7 +27,7 @@ THE SOFTWARE.
   <parent>
     <groupId>org.jenkins-ci.main</groupId>
     <artifactId>pom</artifactId>
-    <version>1.420</version>
+    <version>1.421-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>