diff --git a/requirements.txt b/requirements.txt
index 24cafdc..64210f7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ numpy==1.26.2
 openpyxl==3.1.5
 pandas==3.0.3
 pylatexenc==3.0a21
-python-dateutil==2.8.2
+python-dateutil==2.9.0.post0
 pytz==2026.2
 regex==2026.6.28
 six==1.16.0