diff --git a/requirements.txt b/requirements.txt
index 4aa6842..395a58f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ pluggy==1.6.0
 Pygments==2.21.0
 pylatexenc==3.0b1
 pytest==9.1.1
-python-dateutil==2.9.0.post0
+python-dateutil==3.0.0
 pytz==2026.5
 regex==2026.9.29
 six==1.17.0