diff --git a/bootstrap-common-tests/pom.xml b/bootstrap-common-tests/pom.xml
index 7bc27ede5..4bb98b76a 100644
--- a/bootstrap-common-tests/pom.xml
+++ b/bootstrap-common-tests/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>de.agilecoders.wicket</groupId>
         <artifactId>bootstrap-parent</artifactId>
-        <version>4.0.0-M5</version>
+        <version>4.0.0-M6-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/bootstrap-core/pom.xml b/bootstrap-core/pom.xml
index a2475ce0f..2fed77e03 100644
--- a/bootstrap-core/pom.xml
+++ b/bootstrap-core/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>de.agilecoders.wicket</groupId>
         <artifactId>bootstrap-parent</artifactId>
-        <version>4.0.0-M5</version>
+        <version>4.0.0-M6-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/bootstrap-extensions/pom.xml b/bootstrap-extensions/pom.xml
index 1383553b7..46f8afd72 100644
--- a/bootstrap-extensions/pom.xml
+++ b/bootstrap-extensions/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>de.agilecoders.wicket</groupId>
         <artifactId>bootstrap-parent</artifactId>
-        <version>4.0.0-M5</version>
+        <version>4.0.0-M6-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/bootstrap-less/pom.xml b/bootstrap-less/pom.xml
index 23f7de3b7..81b2968a4 100644
--- a/bootstrap-less/pom.xml
+++ b/bootstrap-less/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>de.agilecoders.wicket</groupId>
         <artifactId>bootstrap-parent</artifactId>
-        <version>4.0.0-M5</version>
+        <version>4.0.0-M6-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/bootstrap-samples/pom.xml b/bootstrap-samples/pom.xml
index da70ce101..b60bc5ef8 100644
--- a/bootstrap-samples/pom.xml
+++ b/bootstrap-samples/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>de.agilecoders.wicket</groupId>
         <artifactId>bootstrap-parent</artifactId>
-        <version>4.0.0-M5</version>
+        <version>4.0.0-M6-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/bootstrap-themes/pom.xml b/bootstrap-themes/pom.xml
index e7e34a510..733e5cf4a 100644
--- a/bootstrap-themes/pom.xml
+++ b/bootstrap-themes/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>de.agilecoders.wicket</groupId>
         <artifactId>bootstrap-parent</artifactId>
-        <version>4.0.0-M5</version>
+        <version>4.0.0-M6-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/pom.xml b/pom.xml
index bc40d1908..405e0e780 100644
--- a/pom.xml
+++ b/pom.xml
@@ -9,7 +9,7 @@
 
     <groupId>de.agilecoders.wicket</groupId>
     <artifactId>bootstrap-parent</artifactId>
-    <version>4.0.0-M5</version>
+    <version>4.0.0-M6-SNAPSHOT</version>
     <packaging>pom</packaging>
     <name>bootstrap-parent</name>
 
@@ -20,7 +20,7 @@
         <url>git@github.com:l0rdn1kk0n/wicket-bootstrap.git</url>
         <connection>scm:git:git@github.com/l0rdn1kk0n/wicket-bootstrap.git</connection>
         <developerConnection>scm:git:ssh://git@github.com/l0rdn1kk0n/wicket-bootstrap.git</developerConnection>
-        <tag>bootstrap-parent-4.0.0-M5</tag>
+        <tag>HEAD</tag>
     </scm>
 
     <issueManagement>