diff --git a/build.gradle b/build.gradle
index c5f0c438fc..3b883c65c3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -27,7 +27,7 @@ allprojects {
         gdxVersion = '1.9.8'
         roboVMVersion = '2.3.0'
         aiVersion = '1.8.1'
-        uCoreVersion = 'b6d22d5'
+        uCoreVersion = ' bffc6d4'
 
         getVersionString = {
             String buildVersion = getBuildVersion()
diff --git a/core/src/io/anuke/mindustry/world/blocks/distribution/MassDriver.java b/core/src/io/anuke/mindustry/world/blocks/distribution/MassDriver.java
index 13d8ce7d7f..3e2f71eaac 100644
--- a/core/src/io/anuke/mindustry/world/blocks/distribution/MassDriver.java
+++ b/core/src/io/anuke/mindustry/world/blocks/distribution/MassDriver.java
@@ -3,8 +3,11 @@ package io.anuke.mindustry.world.blocks.distribution;
 import io.anuke.mindustry.world.Block;
 
 public class MassDriver extends Block {
+    protected float range;
 
     public MassDriver(String name) {
         super(name);
+        update = true;
+        solid = true;
     }
 }