diff --git a/static/minecraft.json b/static/minecraft.json
index d30db4c..ef62626 100644
--- a/static/minecraft.json
+++ b/static/minecraft.json
@@ -331,7 +331,7 @@
             "+traits": ["no-texturepacks"]
         },
         "rd-20090515": {
-            "mainClass": "com.mojang.rubydung.RubyDung",
+            "mainClass": "com.mojang.minecraft.RubyDung",
             "+traits": ["no-texturepacks"]
         },
         "rd-132328": {