diff --git a/pyproject.toml b/pyproject.toml
index 145dc2b..2c3964b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,7 @@ keywords = ["palworld", "editor", "pal"]
 license = {file = "LICENSE"}
 requires-python = ">=3.11"
 readme = "README.md"
-version = "0.3.4"
+version = "0.3.5"
 dependencies = [
     "setuptools==69.1.0",
     "palworld_save_tools==0.19.0",
@@ -21,7 +21,8 @@ dependencies = [
     "pyinstaller==6.4.0",
     "waitress==3.0.0",
     "Flask-JWT-Extended==4.6.0",
-    "pywebview==4.4.1"
+    "PySide6==6.6.3",
+    "requests==2.31.0"
 ]
 classifiers = [
     "Programming Language :: Python :: 3",
diff --git a/requirements.txt b/requirements.txt
index 731e067..8764469 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,3 @@
-# customtkinter==5.2.2
 setuptools==69.1.0
 palworld_save_tools==0.19.0
 wheel==0.42.0
@@ -7,4 +6,5 @@ Flask==3.0.2
 pyinstaller==6.4.0
 waitress==3.0.0
 Flask-JWT-Extended==4.6.0
-pywebview==4.4.1
\ No newline at end of file
+PySide6==6.6.3
+requests==2.31.0
\ No newline at end of file
diff --git a/src/palworld_pal_editor/gui.py b/src/palworld_pal_editor/gui.py
index 5dee4c2..78bee59 100644
--- a/src/palworld_pal_editor/gui.py
+++ b/src/palworld_pal_editor/gui.py
@@ -1,27 +1,40 @@
 import sys
 import threading
 import time
-import traceback
-import webbrowser
-import webview
+import requests
+from PySide6.QtWidgets import QApplication
+from PySide6.QtWebEngineWidgets import QWebEngineView
 from palworld_pal_editor.config import VERSION, Config
 from palworld_pal_editor.utils import LOGGER
 from palworld_pal_editor.webui import main as web_main
 
+class MainWindow(QWebEngineView):
+    def __init__(self, url):
+        super().__init__()
+        self.setWindowTitle(f"Palworld Pal Editor, developed by _connlost with ❤️. VERSION: {VERSION}")
+        self.setMinimumSize(1280, 720)
+        self.load(url)
+        self.resize(1600, 900)
 
 def main():
     t = threading.Thread(target=web_main)
     t.daemon = True
     t.start()
-    try:
-        webview.create_window(f"Palworld Pal Editor, developed by _connlost with ❤️. VERSION: {VERSION}", url=f"http://localhost:{Config.port}/", width=1600, height=1000, min_size=(960, 600))
-        webview.start()
-    except:
-        LOGGER.warning(f"Failed Launching pywebview: {traceback.format_exc()}")
-        LOGGER.info("Fallback to web browser...")
-        threading.Timer(1, lambda: webbrowser.open(f"http://127.0.0.1:{Config.port}") ).start()
-        t.join()
-    sys.exit()
+
+    while True:
+        LOGGER.info("Waiting for backend response...")
+        try:
+            response = requests.get(f"http://127.0.0.1:{Config.port}/api/ready")
+            if response.status_code == 200:
+                LOGGER.info("Backend Ready, Launching GUI...")
+                break
+        except requests.exceptions.ConnectionError:
+            time.sleep(0.5)
+
+    app = QApplication(sys.argv)
+    window = MainWindow(f"http://127.0.0.1:{Config.port}/")
+    window.show()
+    sys.exit(app.exec())
 
 if __name__ == "__main__":
     main()
diff --git a/src/palworld_pal_editor/webui.py b/src/palworld_pal_editor/webui.py
index 7928752..d02c03b 100644
--- a/src/palworld_pal_editor/webui.py
+++ b/src/palworld_pal_editor/webui.py
@@ -46,6 +46,11 @@ def serve(path):
         return send_from_directory(str(static_folder_path), path)
     else:
         return send_from_directory(str(static_folder_path), 'index.html')
+    
+
+@app.route('/api/ready')
+def ready():
+    return reply(status=0), 200
 
 
 @jwt.invalid_token_loader