diff --git a/viafabric-mc1206/src/main/resources/mixins.viafabric1206.address.json b/viafabric-mc1206/src/main/resources/mixins.viafabric1206.address.json
index 8eb4e18..8b43091 100644
--- a/viafabric-mc1206/src/main/resources/mixins.viafabric1206.address.json
+++ b/viafabric-mc1206/src/main/resources/mixins.viafabric1206.address.json
@@ -1,6 +1,6 @@
 {
   "required": true,
-  "compatibilityLevel": "JAVA_17",
+  "compatibilityLevel": "JAVA_21",
   "package": "com.viaversion.fabric.mc1206.mixin.address",
   "mixins": [
   ],
diff --git a/viafabric-mc1206/src/main/resources/mixins.viafabric1206.debug.json b/viafabric-mc1206/src/main/resources/mixins.viafabric1206.debug.json
index 31972d8..7313d56 100644
--- a/viafabric-mc1206/src/main/resources/mixins.viafabric1206.debug.json
+++ b/viafabric-mc1206/src/main/resources/mixins.viafabric1206.debug.json
@@ -1,6 +1,6 @@
 {
   "required": true,
-  "compatibilityLevel": "JAVA_17",
+  "compatibilityLevel": "JAVA_21",
   "package": "com.viaversion.fabric.mc1206.mixin.debug",
   "mixins": [
   ],
diff --git a/viafabric-mc1206/src/main/resources/mixins.viafabric1206.gui.json b/viafabric-mc1206/src/main/resources/mixins.viafabric1206.gui.json
index c5c2b69..462e09f 100644
--- a/viafabric-mc1206/src/main/resources/mixins.viafabric1206.gui.json
+++ b/viafabric-mc1206/src/main/resources/mixins.viafabric1206.gui.json
@@ -1,6 +1,6 @@
 {
   "required": true,
-  "compatibilityLevel": "JAVA_17",
+  "compatibilityLevel": "JAVA_21",
   "package": "com.viaversion.fabric.mc1206.mixin.gui",
   "mixins": [
   ],
diff --git a/viafabric-mc1206/src/main/resources/mixins.viafabric1206.pipeline.json b/viafabric-mc1206/src/main/resources/mixins.viafabric1206.pipeline.json
index 789e2ae..ac881a5 100644
--- a/viafabric-mc1206/src/main/resources/mixins.viafabric1206.pipeline.json
+++ b/viafabric-mc1206/src/main/resources/mixins.viafabric1206.pipeline.json
@@ -1,6 +1,6 @@
 {
   "required": true,
-  "compatibilityLevel": "JAVA_17",
+  "compatibilityLevel": "JAVA_21",
   "package": "com.viaversion.fabric.mc1206.mixin.pipeline",
   "mixins": [
     "MixinClientConnection"