diff --git a/pyproject.toml b/pyproject.toml
index c8dbe4f9..203090e2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,7 +33,7 @@ include = ["CHANGELOG.md", "rootly_sdk/py.typed"]
 python = "^3.10"
 httpx = ">=0.23.0,<0.29.0"
 attrs = ">=22.2.0"
-python-dateutil = "^2.8.0"
+python-dateutil = "^2.9.0"
 
 [build-system]
 requires = ["poetry-core>=2.0.0,<3.0.0"]