diff --git a/Mustang-CLI/pom.xml b/Mustang-CLI/pom.xml
index 0d60df51..341307ae 100644
--- a/Mustang-CLI/pom.xml
+++ b/Mustang-CLI/pom.xml
@@ -23,7 +23,7 @@
         <dependency>
             <groupId>org.mustangproject</groupId>
             <artifactId>validator</artifactId>
-            <version>2.17.0-SNAPSHOT</version>
+            <version>2.16.5-SNAPSHOT</version>
             <!-- prototypes of new mustangproject versions can be installed by referring to them and installed to the local repo from a jar file with
            mvn install:install-file -Dfile=mustang-1.5.4-SNAPSHOT.jar -DgroupId=org.mustangproject.ZUGFeRD -DartifactId=mustang -Dversion=1.5.4 -Dpackaging=jar -DgeneratePom=true
            -->