diff --git a/pom.xml b/pom.xml
index 4ffdba6f..0da854aa 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>org.mustangproject.ZUGFeRD</groupId>
     <artifactId>mustang</artifactId>
-    <version>1.5.5</version>
+    <version>1.5.6-SNAPSHOT</version>
     <packaging>jar</packaging>
     <name>Mustang</name>
     <description>The Mustang project is a java library to read and write ZUGFeRD meta data inside your invoice PDFs</description>
@@ -12,7 +12,7 @@
         <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>mustang-1.5.5</tag>
+        <tag>mustang-1.5.2</tag>
     </scm>
     <repositories>
         <repository><!-- for jargs -->