diff --git a/mustang/pom.xml b/mustang/pom.xml
index 54ae39fd..3a715e3f 100644
--- a/mustang/pom.xml
+++ b/mustang/pom.xml
@@ -4,7 +4,7 @@
 
   <groupId>org.mustangproject.ZUGFeRD</groupId>
   <artifactId>mustang</artifactId>
-  <version>1.1.0</version>
+  <version>1.1.0.alpha</version>
   
 	<repositories>
 		<repository>