diff --git a/pyproject.toml b/pyproject.toml
index 2a67806..0400d40 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,7 +30,7 @@ dependencies = [
   "attrs>=22.2.0",
   "httpx>=0.23.0,<1.0.0",
   "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",
   "pystac>=1.13.0",