diff --git a/Fabric/src/main/resources/terrablender_fabric.mixins.json b/Fabric/src/main/resources/terrablender_fabric.mixins.json
index 68b7d38..ea33150 100644
--- a/Fabric/src/main/resources/terrablender_fabric.mixins.json
+++ b/Fabric/src/main/resources/terrablender_fabric.mixins.json
@@ -1,7 +1,7 @@
 {
   "required": true,
   "package": "terrablender.mixin",
-  "compatibilityLevel": "JAVA_21",
+  "compatibilityLevel": "JAVA_17",
   "mixins": [
     "MixinMinecraftServer"
   ],
diff --git a/NeoForge/src/main/resources/terrablender_neoforge.mixins.json b/NeoForge/src/main/resources/terrablender_neoforge.mixins.json
index 902c224..b22099c 100644
--- a/NeoForge/src/main/resources/terrablender_neoforge.mixins.json
+++ b/NeoForge/src/main/resources/terrablender_neoforge.mixins.json
@@ -1,7 +1,7 @@
 {
   "required": true,
   "package": "terrablender.mixin",
-  "compatibilityLevel": "JAVA_21",
+  "compatibilityLevel": "JAVA_17",
   "refmap": "terrablender.refmap.json",
   "mixins": [
   ],