diff --git a/README.md b/README.md
index fc2b24c..4203fd2 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ for experimental local testing and playing
 
 ## Instructions
 
-1. Install [python](https://www.python.org/ftp/python/3.10.8/python-3.10.8-amd64.exe) with "Add python.exe to PATH" checked
+1. Install [python](https://www.python.org/ftp/python/3.11.1/python-3.11.1-amd64.exe) with "Add python.exe to PATH" checked
 
 1. Run `start.bat`
 
diff --git a/modules/ddr/api.py b/modules/ddr/api.py
index 6436784..24b42b5 100644
--- a/modules/ddr/api.py
+++ b/modules/ddr/api.py
@@ -11,7 +11,7 @@ import utils.card as conv
 from utils.lz77 import EamuseLZ77
 
 import lxml.etree as ET
-import json
+import ujson as json
 import struct
 from typing import Dict, List, Tuple
 from os import path
diff --git a/pyeamu.py b/pyeamu.py
index d700943..63201a5 100644
--- a/pyeamu.py
+++ b/pyeamu.py
@@ -2,7 +2,7 @@ from urllib.parse import urlunparse, urlencode
 
 import uvicorn
 
-import json
+import ujson as json
 from os import path
 
 from fastapi import FastAPI, Request, Response
diff --git a/requirements.txt b/requirements.txt
index 3e01414..8f41547 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,17 +2,18 @@ anyio==3.6.2
 asgiref==3.5.2
 click==8.1.3
 colorama==0.4.6
-fastapi==0.86.0
+fastapi==0.88.0
 h11==0.14.0
 idna==3.4
 kbinxml==1.7
-lxml==4.9.1
-pycryptodomex==3.15.0
+lxml==4.9.2
+pycryptodomex==3.16.0
 pydantic==1.10.2
 python-multipart==0.0.5
 six==1.16.0
 sniffio==1.3.0
-starlette==0.20.4
+starlette==0.22.0
 tinydb==4.7.0
 typing_extensions==4.4.0
-uvicorn==0.19.0
+ujson==5.6.0
+uvicorn[standard]==0.20.0
diff --git a/start.bat b/start.bat
index 7829b01..cc8d01f 100644
--- a/start.bat
+++ b/start.bat
@@ -2,7 +2,7 @@
 
 cd /d %~dp0
 
-if exist .venv\Lib\site-packages\six.py (
+if exist .venv\Lib\site-packages\ujson*.pyd (
   (
     .venv\Scripts\activate.bat
     python pyeamu.py
@@ -17,8 +17,8 @@ if exist .venv\Lib\site-packages\six.py (
 )
 
 echo:
-echo Install python and check "Add python.exe to PATH"
-echo https://www.python.org/ftp/python/3.10.8/python-3.10.8-amd64.exe
+echo Install python with "Add python.exe to PATH" checked
+echo https://www.python.org/ftp/python/3.11.1/python-3.11.1-amd64.exe
 echo:
 
 pause