diff --git a/lib/protocol.js b/lib/protocol.js
index 8418314..02416ba 100644
--- a/lib/protocol.js
+++ b/lib/protocol.js
@@ -124,7 +124,8 @@ var packets = {
   ],
   0x13: [
     { name: "entityId", type: "int" },
-    { name: "actionId", type: "byte" }
+    { name: "actionId", type: "byte" },
+    { name: "jumpBoost", type: "int" }
   ],
   0x14: [
     { name: "entityId", type: "int" },