diff --git a/metadata/jonas.tool.saveForOffline.txt b/metadata/jonas.tool.saveForOffline.txt
index 02ab8b295d..54f9d343ce 100644
--- a/metadata/jonas.tool.saveForOffline.txt
+++ b/metadata/jonas.tool.saveForOffline.txt
@@ -41,10 +41,10 @@ Build:2.1.0 Beta,13
     rm=app/libs/*jar
 
 Build:3.1.0,18
-    disable=missing semicolon
-    commit=v3.1.0
+    commit=df4a583079c270741203bffd2e2ead0c1dade6fb
     subdir=app
     gradle=yes
+    prebuild=sed -i -e '/buildTypes/icompileOptions {\n\nsourceCompatibility JavaVersion.VERSION_1_7\n\ntargetCompatibility JavaVersion.VERSION_1_7\n\n}' build.gradle
 
 Maintainer Notes:
 UCM:Tags and AUM:Version v%v when tagging is stable.