diff --git a/build.gradle b/build.gradle
index 84899de744..f19fac9c69 100644
--- a/build.gradle
+++ b/build.gradle
@@ -25,7 +25,7 @@ allprojects {
         appName = 'Mindustry'
         gdxVersion = '1.9.8'
         aiVersion = '1.8.1'
-        uCoreVersion = '872bce6'
+        uCoreVersion = '39939f7'
 
         getVersionString = {
             String buildVersion = getBuildVersion()
diff --git a/core/assets/version.properties b/core/assets/version.properties
index 97069d4650..24992b3c1c 100644
--- a/core/assets/version.properties
+++ b/core/assets/version.properties
@@ -1,7 +1,7 @@
 #Autogenerated file. Do not modify.
-#Fri Mar 16 20:29:53 EDT 2018
+#Fri Mar 16 22:39:48 EDT 2018
 version=release
-androidBuildCode=443
+androidBuildCode=446
 name=Mindustry
 code=3.4
 build=custom build