diff --git a/requirements.txt b/requirements.txt
index 88f5447..23ea263 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -49,7 +49,7 @@ jmespath==1.0.1
 boto3>=1.9.198,<1.39.0
 botocore>=1.12.198,<1.39.0
 
-python-dateutil==2.9.0
+python-dateutil==2.9.0.post0
 
 python-cas==1.6.0
 django-cas-ng==5.0.1