diff --git a/build.gradle b/build.gradle
index 4ffbf8b723a6af95bb3c50d2858e6696b3b1669b..42cdc17c1f213adced7578e8943158b0c80dbf88 100644
--- a/build.gradle
+++ b/build.gradle
@@ -31,7 +31,7 @@ project(':de.prob.core') {
 	}
 
 
-        def parser_version = '2.8.0'
+        def parser_version = '2.6.3'
 
 	dependencies {
 	 compile group: "de.hhu.stups", name: "answerparser", version: parser_version , changing: true
diff --git a/de.prob.core/build.gradle b/de.prob.core/build.gradle
index 3cd8fa21317f6958e651cc3122ac3df1bd773531..80f747e2ef91ece50de98ee0940182400e7ae953 100644
--- a/de.prob.core/build.gradle
+++ b/de.prob.core/build.gradle
@@ -1,6 +1,6 @@
 apply plugin: 'java'
 
-def parser_version = '2.8.0'
+def parser_version = '2.6.3'
 
 dependencies {
  compile group: "de.hhu.stups", name: "answerparser", version: parser_version , changing: true