diff --git a/requirements.txt b/requirements.txt
index 534c1c6..8388b2a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ numpy==2.4.3
 pelican==4.0.1
 Pygments==2.19.2
 pyreadline==2.1
-python-dateutil==2.8.0
+python-dateutil==2.9.0.post0
 pytz==2026.1.post1
 regex==2018.1.10
 requests==2.33.0