diff --git a/build.gradle b/build.gradle
index 7b908ebb8..f2d46ad1b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -88,8 +88,8 @@ repositories {
 }
 
 dependencies {
-    //mixin needs to be distributed with the mod, very important
-    compile("org.spongepowered:mixin:0.8.1-SNAPSHOT") {
+    // mixin needs to be distributed with the mod, very important
+    compile("org.spongepowered:mixin:0.7.8-SNAPSHOT") { // do NOT update this to 8.0 or above, it breaks compatibility with future client
         exclude module: 'launchwrapper'
         exclude module: 'guava'
         exclude module: 'gson'