diff --git a/package.json b/package.json
index bde7622..e9c4d83 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
     "lodash.merge": "^4.3.0",
     "minecraft-data": "^2.14.0",
     "prismarine-nbt": "^1.0.0",
-    "protodef": "^1.3.0",
+    "protodef": "^1.5.1",
     "readable-stream": "^2.0.5",
     "ursa-purejs": "^0.0.3",
     "uuid-1345": "^0.99.6",
diff --git a/src/transforms/serializer.js b/src/transforms/serializer.js
index 5f8e9be..35f1a09 100644
--- a/src/transforms/serializer.js
+++ b/src/transforms/serializer.js
@@ -9,15 +9,6 @@ const states = require("../states");
 const merge=require("lodash.merge");
 const get=require("lodash.get");
 
-function recursiveAddTypes(protocol,protocolData,path)
-{
-  if(protocolData===undefined)
-    return;
-  if(protocolData.types)
-    protocol.addTypes(protocolData.types);
-  recursiveAddTypes(protocol,get(protocolData,path.shift()),path);
-}
-
 const protocols={};
 
 function createProtocol(state,direction,version,customPackets)
@@ -25,10 +16,10 @@ function createProtocol(state,direction,version,customPackets)
   const key=state+";"+direction+";"+version;
   if(protocols[key])
     return protocols[key];
-  const proto = new ProtoDef();
+  const proto = new ProtoDef(false);
   proto.addTypes(minecraft);
   const mcData=require("minecraft-data")(version);
-  recursiveAddTypes(proto,merge(mcData.protocol,get(customPackets,[mcData.version.majorVersion])),[state,direction]);
+  proto.addProtocol(merge(mcData.protocol,get(customPackets,[mcData.version.majorVersion])),[state,direction]);
   protocols[key]=proto;
   return proto;
 }