diff --git a/requirements-dev.txt b/requirements-dev.txt
index 42c281a7..e61b67a2 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -90,7 +90,7 @@ pytest-trio==0.8.0
 
 pytest-asyncio==0.24.0
 
-pywin32==308 ; platform_system == 'Windows'
+pywin32==309 ; platform_system == 'Windows'
 
 requests==2.32.3 ; python_version >= '3.7'