diff --git a/de.prob.core/build.gradle b/de.prob.core/build.gradle
index f293040dadbc6b6d319908d1a0f4424c59ddfe48..f641c88dc00fce6b45fe8cb1f1da61f5c1091a16 100644
--- a/de.prob.core/build.gradle
+++ b/de.prob.core/build.gradle
@@ -1,6 +1,6 @@
 apply plugin: 'java'
 
-def parser_version = '2.9.22'
+def parser_version = '2.5.0'
 
 dependencies {
  compile group: "de.hhu.stups", name: "answerparser", version: parser_version , changing: true