diff --git a/client/index.js b/client/index.js
index a1131b4..2fc948e 100644
--- a/client/index.js
+++ b/client/index.js
@@ -1,4 +1,5 @@
 // 3rd party.
+import msgpack from 'msgpack-lite';
 import React from 'react';
 import ReactDOM from 'react-dom';
 // 2nd party.
@@ -154,7 +155,7 @@ const pointerMovementHandle = setInterval(() => {
 const inputHandle = setInterval(() => {
   if (actionState !== actionRegistry.state) {
     actionState = actionRegistry.state;
-    socket.send(new InputPacket(JSON.stringify(actionRegistry.state.toJS())));
+    socket.send(new InputPacket(msgpack.encode(actionRegistry.state.toJS())));
   }
 }, 1000 / 60);
 // Prediction.
diff --git a/common/packet/input.js b/common/packet/input.js
index 7f697e6..8bbdff9 100644
--- a/common/packet/input.js
+++ b/common/packet/input.js
@@ -5,8 +5,8 @@ export class InputPacket extends Packet {
   static get schema() {
     return {
       ...super.schema,
-      // TODO we can do better than JSON.
-      data: 'string',
+      data: 'buffer',
     };
   }
+  
 }
diff --git a/server/game.js b/server/game.js
index 0480154..877abcb 100644
--- a/server/game.js
+++ b/server/game.js
@@ -1,4 +1,5 @@
 // Node.
+import msgpack from 'msgpack-lite';
 import {performance} from 'perf_hooks';
 // 3rd party.
 // 2nd party.
@@ -52,7 +53,7 @@ function createPacketListener(socket) {
   const {entity} = socket;
   return (packet) => {
     if (packet instanceof InputPacket) {
-      entity.inputState = JSON.parse(packet.data);
+      entity.inputState = msgpack.decode(packet.data);
     }
   };
 }