diff --git a/src/main/resources/assets/minosoft/mapping/versions.json b/src/main/resources/assets/minosoft/mapping/versions.json
index 169d3847a..2899e11bb 100644
--- a/src/main/resources/assets/minosoft/mapping/versions.json
+++ b/src/main/resources/assets/minosoft/mapping/versions.json
@@ -7,7 +7,7 @@
   },
   "903": {
     "name": "1.20.1-rc1",
-    "protocol_id": 1073741965,
+    "protocol_id": 1073741966,
     "packets": 880
   },
   "901": {