diff --git a/pyproject.toml b/pyproject.toml
index 6955daf..fb6a4cf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ dependencies = [
         "pydantic>=2.4.1",
         "geojson-pydantic>=1.0.0",
         "ciso8601~=2.3",
-        "python-dateutil>=2.7.0"]
+        "python-dateutil>=2.7.0",]
 dynamic = ["version", "readme"]
 
 [project.scripts]
@@ -49,6 +49,7 @@ lint = [
         "types-requests>=2.31.0.5",
         "types-jsonschema>=4.19.0.3",
         "types-PyYAML>=6.0.12.12",
+        "types-python-dateutil>=2.7.0",
         "black>=23.9.1",
         "isort>=5.12.0",
         "flake8>=6.1.0",