diff --git a/Mustang-CLI/pom.xml b/Mustang-CLI/pom.xml
index 6d3b12ad..0e7c25d4 100644
--- a/Mustang-CLI/pom.xml
+++ b/Mustang-CLI/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.mustangproject</groupId>
         <artifactId>core</artifactId>
-        <version>2.13.1-SNAPSHOT</version>
+        <version>2.13.1</version>
     </parent>
 
     <artifactId>Mustang-CLI</artifactId>
diff --git a/library/pom.xml b/library/pom.xml
index e62636d5..431ebf27 100644
--- a/library/pom.xml
+++ b/library/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.mustangproject</groupId>
         <artifactId>core</artifactId>
-        <version>2.13.1-SNAPSHOT</version>
+        <version>2.13.1</version>
     </parent>
     <artifactId>library</artifactId>
     <packaging>jar</packaging>
diff --git a/pom.xml b/pom.xml
index eab363ea..63efc52b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>org.mustangproject</groupId>
     <artifactId>core</artifactId>
-    <version>2.13.1-SNAPSHOT</version>
+    <version>2.13.1</version>
     <packaging>pom</packaging>
     <name>Mustang</name>
 
@@ -83,7 +83,7 @@
         <connection>scm:git:https://github.com/ZUGFeRD/mustangproject.git</connection>
         <developerConnection>scm:git:https://github.com/ZUGFeRD/mustangproject.git</developerConnection>
         <url>https://github.com/ZUGFeRD/mustangproject</url>
-      <tag>HEAD</tag>
+      <tag>core-2.13.1</tag>
   </scm>
 
     <distributionManagement>
diff --git a/validator/pom.xml b/validator/pom.xml
index 7b0152b3..862ca95c 100644
--- a/validator/pom.xml
+++ b/validator/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.mustangproject</groupId>
         <artifactId>core</artifactId>
-        <version>2.13.1-SNAPSHOT</version>
+        <version>2.13.1</version>
     </parent>
     
     <artifactId>validator</artifactId>