diff --git a/build.gradle b/build.gradle
index 2455ca1b60..b6d07527ab 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,12 +5,13 @@ buildscript{
         google()
         maven{ url "https://oss.sonatype.org/content/repositories/snapshots/" }
         jcenter()
+        maven{ url 'https://jitpack.io' }
     }
 
     dependencies{
-        classpath 'com.mobidevelop.robovm:robovm-gradle-plugin:2.3.8-SNAPSHOT'
+        classpath 'com.mobidevelop.robovm:robovm-gradle-plugin:2.3.7'
         classpath "com.badlogicgames.gdx:gdx-tools:1.9.10"
-        classpath "com.badlogicgames.packr:packr:2.1-SNAPSHOT"
+        classpath "com.github.anuken:packr:-SNAPSHOT"
     }
 }
 
@@ -25,7 +26,7 @@ allprojects{
         if(!project.hasProperty("versionType")) versionType = 'official'
         appName = 'Mindustry'
         gdxVersion = '1.9.10'
-        roboVMVersion = '2.3.8-SNAPSHOT'
+        roboVMVersion = '2.3.7'
         steamworksVersion = '1.8.0'
         arcHash = null
 
diff --git a/core/src/io/anuke/mindustry/core/Control.java b/core/src/io/anuke/mindustry/core/Control.java
index 08302458d2..e5d5b2b9ce 100644
--- a/core/src/io/anuke/mindustry/core/Control.java
+++ b/core/src/io/anuke/mindustry/core/Control.java
@@ -29,8 +29,8 @@ import java.text.*;
 import java.util.*;
 
 import static io.anuke.arc.Core.*;
-import static io.anuke.mindustry.Vars.*;
 import static io.anuke.mindustry.Vars.net;
+import static io.anuke.mindustry.Vars.*;
 
 /**
  * Control module.
diff --git a/core/src/io/anuke/mindustry/game/SpawnGroup.java b/core/src/io/anuke/mindustry/game/SpawnGroup.java
index 4637ba4bfd..e799e26c40 100644
--- a/core/src/io/anuke/mindustry/game/SpawnGroup.java
+++ b/core/src/io/anuke/mindustry/game/SpawnGroup.java
@@ -3,6 +3,7 @@ package io.anuke.mindustry.game;
 import io.anuke.arc.util.serialization.Json;
 import io.anuke.arc.util.serialization.Json.Serializable;
 import io.anuke.arc.util.serialization.JsonValue;
+import io.anuke.mindustry.content.*;
 import io.anuke.mindustry.entities.type.BaseUnit;
 import io.anuke.mindustry.type.*;
 
@@ -84,6 +85,7 @@ public class SpawnGroup implements Serializable{
     @Override
     public void read(Json json, JsonValue data){
         type = content.getByName(ContentType.unit, data.getString("type", "dagger"));
+        if(type == null) type = UnitTypes.dagger;
         begin = data.getInt("begin", 0);
         end = data.getInt("end", never);
         spacing = data.getInt("spacing", 1);
diff --git a/gradle.properties b/gradle.properties
index 105ea9a7a4..7c8749e926 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,3 +1,3 @@
 org.gradle.daemon=true
 org.gradle.jvmargs=-Xms256m -Xmx1024m
-archash=b87d817844e1da093b31da06870c0970176648a9
+archash=411d2784f538dfc10db2962a62833938029dafdd