diff --git a/requirements/requirements-dev.txt b/requirements/requirements-dev.txt
index f4c5f9a..7ec205d 100644
--- a/requirements/requirements-dev.txt
+++ b/requirements/requirements-dev.txt
@@ -136,7 +136,7 @@ tqdm==4.67.1
     # via cladetime (pyproject.toml)
 types-awscrt==0.27.2
     # via botocore-stubs
-types-python-dateutil==2.9.0.20250516
+types-python-dateutil==2.9.0.20250822
     # via cladetime (pyproject.toml)
 types-requests==2.32.0.20250515
     # via cladetime (pyproject.toml)