diff --git a/data/protocol.json b/data/protocol.json
index 9939656..bb9cf99 100644
--- a/data/protocol.json
+++ b/data/protocol.json
@@ -341,11 +341,15 @@
               "type": "i32"
             },
             {
-              "name": "y",
+              "name": "z",
               "type": "i32"
             },
             {
-              "name": "z",
+              "name": "y",
+              "type": "i8"
+            },
+            {
+              "name": "block_id",
               "type": "i8"
             },
             {