diff --git a/requirements.txt b/requirements.txt
index 7b4d87d..c254b45 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,3 +24,4 @@ toml==0.10.2
 tomli==2.0.1
 typing_extensions==4.3.0
 virtualenv==20.16.2
+python-dateutil==2.9.0.post0