diff --git a/qt_ui/main.py b/qt_ui/main.py
index 47c5376d..f048827b 100644
--- a/qt_ui/main.py
+++ b/qt_ui/main.py
@@ -1,7 +1,6 @@
 import argparse
 import logging
 import ntpath
-import os
 import sys
 from datetime import datetime
 from pathlib import Path
@@ -80,7 +79,6 @@ def on_game_load(game: Optional[Game]) -> None:
 
 
 def run_ui(game: Optional[Game], ui_flags: UiFlags) -> None:
-    os.environ["QT_ENABLE_HIGHDPI_SCALING"] = "1"  # Potential fix for 4K screens
     QApplication.setHighDpiScaleFactorRoundingPolicy(
         Qt.HighDpiScaleFactorRoundingPolicy.PassThrough
     )
diff --git a/requirements.txt b/requirements.txt
index aae1114d..58b45120 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -38,9 +38,9 @@ pyinstaller-hooks-contrib==2023.5
 pyparsing==3.1.1
 pyproj==3.6.1
 pyshp==2.3.1
-PySide6==6.5.3
-PySide6-Addons==6.5.3
-PySide6-Essentials==6.5.3
+PySide6==6.4.3
+PySide6-Addons==6.4.3
+PySide6-Essentials==6.4.3
 pytest==7.4.2
 pytest-cov==4.1.0
 python-dateutil==2.8.2
@@ -48,7 +48,7 @@ python-dotenv==1.0.0
 pywin32-ctypes==0.2.2
 PyYAML==6.0.1
 Shapely==2.0.1
-shiboken6==6.5.3
+shiboken6==6.4.3
 six==1.16.0
 sniffio==1.3.0
 starlette==0.27.0