diff --git a/pyproject.toml b/pyproject.toml
index b7f7871..4fbb49c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ include = ["openapi_client/py.typed"]
 python = "^3.8"
 
 urllib3 = ">= 1.25.3 < 3.0.0"
-python-dateutil = ">= 2.8.2"
+python-dateutil = ">=2.9.0.post0"
 pydantic = ">= 2"
 typing-extensions = ">= 4.7.1"