diff --git a/src/main/resources/mixins.core.json b/src/main/resources/mixins.core.json
index 7d0fe8b..5dc7cb6 100755
--- a/src/main/resources/mixins.core.json
+++ b/src/main/resources/mixins.core.json
@@ -6,7 +6,7 @@
   "target": "@env(DEFAULT)",
   "compatibilityLevel": "JAVA_17",
   "server": [
-    "ChunkMapMixin",
+    "isolation.net_minecraft_server_level.ChunkMapMixin",
     "MixinSpongeSIMD",
     "MixinAABB",
     "MixinDirection",