diff --git a/setup.py b/setup.py
index 32e7733313c95e0ead2c57ede29c04c15437a617..88c10d266693c7514d8dea36c67bcbf3b074fb0e 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@ requirements = [
     "scipy>=1.11.4",
     "pytest>=3",
     "pyyaml>=6.0.1",
-    "pygame-gui>=0.6.9",
+    "pygame-gui==0.6.9",
     "pydantic>=2.6.3",
     "fastapi>=0.109.2",
     "uvicorn>=0.27.0",