Update build.gradle

build.gradle

@@ -6,8 +6,8 @@ apply plugin: 'maven'
 project.version = '3.2.9-SNAPSHOT'
 project.group = 'de.stups'
 allprojects {
-    sourceCompatibility = 1.6
-    targetCompatibility = 1.6
+    sourceCompatibility = 1.5
+    targetCompatibility = 1.5
 }
 
 repositories {