diff --git a/cli/pom.xml b/cli/pom.xml
index 08c3ed9fbe..133939ecde 100644
--- a/cli/pom.xml
+++ b/cli/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>org.jenkins-ci.main</groupId>
     <artifactId>pom</artifactId>
-    <version>2.90</version>
+    <version>2.91-SNAPSHOT</version>
   </parent>
 
   <artifactId>cli</artifactId>
diff --git a/core/pom.xml b/core/pom.xml
index 96e29c90c7..4ad829605c 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -29,7 +29,7 @@ THE SOFTWARE.
   <parent>
     <groupId>org.jenkins-ci.main</groupId>
     <artifactId>pom</artifactId>
-    <version>2.90</version>
+    <version>2.91-SNAPSHOT</version>
   </parent>
 
   <artifactId>jenkins-core</artifactId>
diff --git a/pom.xml b/pom.xml
index 682d7b539a..e217502e3b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -33,7 +33,7 @@ THE SOFTWARE.
 
   <groupId>org.jenkins-ci.main</groupId>
   <artifactId>pom</artifactId>
-  <version>2.90</version>
+  <version>2.91-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <name>Jenkins main module</name>
@@ -58,7 +58,7 @@ THE SOFTWARE.
     <connection>scm:git:git://github.com/jenkinsci/jenkins.git</connection>
     <developerConnection>scm:git:ssh://git@github.com/jenkinsci/jenkins.git</developerConnection>
     <url>https://github.com/jenkinsci/jenkins</url>
-    <tag>jenkins-2.90</tag>
+    <tag>HEAD</tag>
   </scm>
 
   <distributionManagement>
diff --git a/test/pom.xml b/test/pom.xml
index e67bc9a463..98a5258e07 100644
--- a/test/pom.xml
+++ b/test/pom.xml
@@ -28,7 +28,7 @@ THE SOFTWARE.
   <parent>
     <groupId>org.jenkins-ci.main</groupId>
     <artifactId>pom</artifactId>
-    <version>2.90</version>
+    <version>2.91-SNAPSHOT</version>
   </parent>
 
   <artifactId>test</artifactId>
diff --git a/war/pom.xml b/war/pom.xml
index aa09089e8a..f5f75f4e32 100644
--- a/war/pom.xml
+++ b/war/pom.xml
@@ -28,7 +28,7 @@ THE SOFTWARE.
   <parent>
     <groupId>org.jenkins-ci.main</groupId>
     <artifactId>pom</artifactId>
-    <version>2.90</version>
+    <version>2.91-SNAPSHOT</version>
   </parent>
 
   <artifactId>jenkins-war</artifactId>