diff --git a/graalvm/pom.xml b/graalvm/pom.xml
index 8f84000f..db405508 100644
--- a/graalvm/pom.xml
+++ b/graalvm/pom.xml
@@ -5,7 +5,7 @@
         <groupId>io.github.jmurmel</groupId>
         <artifactId>jmurmel-all</artifactId>
         <relativePath>../pom.xml</relativePath>
-        <version>1.5.0</version>
+        <version>1.5.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>unsupported</artifactId>
diff --git a/lambda/pom.xml b/lambda/pom.xml
index ed8a18af..9baf0d9a 100755
--- a/lambda/pom.xml
+++ b/lambda/pom.xml
@@ -5,7 +5,7 @@
         <groupId>io.github.jmurmel</groupId>
         <artifactId>jmurmel-all</artifactId>
         <relativePath>../pom.xml</relativePath>
-        <version>1.5.0</version>
+        <version>1.5.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>jmurmel</artifactId>
diff --git a/lambdajbm/pom.xml b/lambdajbm/pom.xml
index 9558986f..a9ddf01e 100644
--- a/lambdajbm/pom.xml
+++ b/lambdajbm/pom.xml
@@ -5,7 +5,7 @@
         <groupId>io.github.jmurmel</groupId>
         <artifactId>jmurmel-all</artifactId>
         <relativePath>../pom.xml</relativePath>
-        <version>1.5.0</version>
+        <version>1.5.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>jmurmelbm</artifactId>
@@ -35,7 +35,7 @@
         <dependency>
             <groupId>io.github.jmurmel</groupId>
             <artifactId>jmurmel</artifactId>
-            <version>1.5.0</version>
+            <version>1.5.1-SNAPSHOT</version>
             <scope>compile</scope>
         </dependency>
 
diff --git a/pom.xml b/pom.xml
index 528a588a..d417d8ed 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
 
     <groupId>io.github.jmurmel</groupId>
     <artifactId>jmurmel-all</artifactId>
-    <version>1.5.0</version>
+    <version>1.5.1-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <description>Murmel interpreter/ compiler</description>
@@ -20,7 +20,7 @@
         <url>https://github.com/mayerrobert/jmurmel/blob/master</url>
         <connection>scm:git:git://github.com/mayerrobert/jmurmel.git</connection>
         <developerConnection>scm:git:git@github.com:mayerrobert/jmurmel.git</developerConnection>
-        <tag>jmurmel-all-1.5.0</tag>
+        <tag>HEAD</tag>
     </scm>
 
     <properties>
diff --git a/samples.murmel-mlib/pom.xml b/samples.murmel-mlib/pom.xml
index 8271bd77..9b9e2627 100644
--- a/samples.murmel-mlib/pom.xml
+++ b/samples.murmel-mlib/pom.xml
@@ -5,11 +5,11 @@
         <groupId>io.github.jmurmel</groupId>
         <artifactId>jmurmel-all</artifactId>
         <relativePath>../pom.xml</relativePath>
-        <version>1.5.0</version>
+        <version>1.5.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>samples.murmel-mlib</artifactId>
-    <version>1.5.0</version>
+    <version>1.5.1-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <properties>
@@ -24,7 +24,7 @@
         <dependency>
             <groupId>io.github.jmurmel</groupId>
             <artifactId>jmurmel</artifactId>
-            <version>1.5.0</version>
+            <version>1.5.1-SNAPSHOT</version>
             <scope>compile</scope>
         </dependency>
     </dependencies>
diff --git a/samples.murmel/pom.xml b/samples.murmel/pom.xml
index d11bee92..e3dce02d 100644
--- a/samples.murmel/pom.xml
+++ b/samples.murmel/pom.xml
@@ -5,11 +5,11 @@
         <groupId>io.github.jmurmel</groupId>
         <artifactId>jmurmel-all</artifactId>
         <relativePath>../pom.xml</relativePath>
-        <version>1.5.0</version>
+        <version>1.5.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>samples.murmel</artifactId>
-    <version>1.5.0</version>
+    <version>1.5.1-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <properties>
@@ -24,7 +24,7 @@
         <dependency>
             <groupId>io.github.jmurmel</groupId>
             <artifactId>jmurmel</artifactId>
-            <version>1.5.0</version>
+            <version>1.5.1-SNAPSHOT</version>
             <scope>compile</scope>
         </dependency>
     </dependencies>
diff --git a/scripts/pom.xml b/scripts/pom.xml
index aa42a912..6db30d58 100644
--- a/scripts/pom.xml
+++ b/scripts/pom.xml
@@ -5,11 +5,11 @@
         <groupId>io.github.jmurmel</groupId>
         <artifactId>jmurmel-all</artifactId>
         <relativePath>../pom.xml</relativePath>
-        <version>1.5.0</version>
+        <version>1.5.1-SNAPSHOT</version>
     </parent>
 
     <artifactId>scripts</artifactId>
-    <version>1.5.0</version>
+    <version>1.5.1-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <properties>