diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 5c5c7f2..61b8975
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,5 +6,5 @@ typing-extensions>=4.5.0
 
 # Optional dependencies for enhanced functionality
 cryptography>=41.0.0
-python-dateutil>=2.8.0
+python-dateutil>=2.9.0.post0
 PyJWT>=2.8.0