diff --git a/core-cpp/pom.xml b/core-cpp/pom.xml
index 8b7f5ed9..7ba958ba 100644
--- a/core-cpp/pom.xml
+++ b/core-cpp/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>org.ode4j</groupId>
 		<artifactId>parent</artifactId>
-		<version>0.5.1-SNAPSHOT</version>
+		<version>0.5.1</version>
 	</parent>
 
 	<artifactId>core-cpp</artifactId>
diff --git a/core/pom.xml b/core/pom.xml
index e9607096..b078b18c 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>org.ode4j</groupId>
 		<artifactId>parent</artifactId>
-		<version>0.5.1-SNAPSHOT</version>
+		<version>0.5.1</version>
 	</parent>
 
 	<artifactId>core</artifactId>
diff --git a/demo-cpp/pom.xml b/demo-cpp/pom.xml
index dcf109fd..917b4f5f 100644
--- a/demo-cpp/pom.xml
+++ b/demo-cpp/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>org.ode4j</groupId>
 		<artifactId>parent</artifactId>
-		<version>0.5.1-SNAPSHOT</version>
+		<version>0.5.1</version>
 	</parent>
 
 	<artifactId>demo-cpp</artifactId>
diff --git a/demo/pom.xml b/demo/pom.xml
index c9ac4895..0bc91c65 100644
--- a/demo/pom.xml
+++ b/demo/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.ode4j</groupId>
 		<artifactId>parent</artifactId>
-		<version>0.5.1-SNAPSHOT</version>
+		<version>0.5.1</version>
 	</parent>
 
 	<artifactId>demo</artifactId>
diff --git a/pom.xml b/pom.xml
index 83a363d5..452c8b90 100644
--- a/pom.xml
+++ b/pom.xml
@@ -11,7 +11,7 @@
 
 	<groupId>org.ode4j</groupId>
 	<artifactId>parent</artifactId>
-	<version>0.5.1-SNAPSHOT</version>
+	<version>0.5.1</version>
 	<packaging>pom</packaging>
 
 	<modules>
@@ -57,7 +57,7 @@
 		<url>https://github.com/tzaeschke/ode4j</url>
 		<connection>scm:git:git@github.com:tzaeschke/ode4j.git</connection>
 		<developerConnection>scm:git:git@github.com:tzaeschke/ode4j.git</developerConnection>
-	  <tag>HEAD</tag>
+	  <tag>parent-0.5.1</tag>
   </scm>
 
 	<developers>