diff --git a/src/main/resources/minekord.mixins.json b/src/main/resources/minekord.mixins.json
index 5cf9ec6..770c0fd 100644
--- a/src/main/resources/minekord.mixins.json
+++ b/src/main/resources/minekord.mixins.json
@@ -2,7 +2,7 @@
     "required": true,
     "minVersion": "0.8",
     "package": "ua.mei.minekord.mixin",
-    "compatibilityLevel": "JAVA_17",
+    "compatibilityLevel": "JAVA_21",
     "mixins": [
         "AboutExtensionMixin",
         "PlayerAdvancementTrackerMixin",