diff --git a/pyproject.toml b/pyproject.toml
index 044942a9c..d8d0ce4e3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,7 +42,7 @@ readme = "README.md"
 
 [project.optional-dependencies]
 dev = [
-    "types-python-dateutil==2.9.0.20240316",
+    "types-python-dateutil==2.9.0.20241206",
     "pytest==8.3.2",
     "pytest-asyncio==0.24.0",
     "pytest-dotenv==0.5.2",