diff --git a/build.gradle b/build.gradle
index bd2ce53..fdd7b0d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -8,7 +8,7 @@ plugins {
 group = 'org.cryptimeleon'
 archivesBaseName = project.name
 boolean isRelease = project.hasProperty("release")
-version = '3.1.0'  + (isRelease ? "" : "-SNAPSHOT")
+version = '4.0.0'  + (isRelease ? "" : "-SNAPSHOT")
 
 
 sourceCompatibility = 1.8