diff --git a/build.properties b/build.properties
index 288d093d2..f8c59d74c 100644
--- a/build.properties
+++ b/build.properties
@@ -3,7 +3,7 @@ javacSource=1.4
 javacTarget=1.4
 
 # Release Configuration
-releaseVersion=0.53
+releaseVersion=0.531
 releaseFile=yacy_v${releaseVersion}_${DSTAMP}_${releaseNr}.tar.gz
 proReleaseFile=yacy_pro_v${releaseVersion}_${DSTAMP}_${releaseNr}.tar.gz
 releaseFileParentDir=yacy
diff --git a/lib/YaCyUpdater_r3.jar b/lib/YaCyUpdater_r3.jar
deleted file mode 100644
index 617031c50..000000000
Binary files a/lib/YaCyUpdater_r3.jar and /dev/null differ
diff --git a/lib/YaCyUpdater_r4.jar b/lib/YaCyUpdater_r4.jar
new file mode 100644
index 000000000..4fd1219fd
Binary files /dev/null and b/lib/YaCyUpdater_r4.jar differ