diff --git a/etc/environment.yml b/etc/environment.yml
index 01f3f86010..b5d248a1a9 100644
--- a/etc/environment.yml
+++ b/etc/environment.yml
@@ -31,7 +31,6 @@ dependencies:
   - virtualenv
 
   # optional
-  - python-dateutil>=2.4.0
   - affine
   - scipy
   - pandas
diff --git a/pyproject.toml b/pyproject.toml
index 1ddff9292d..4df77b77e5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -70,7 +70,6 @@ optional = [
     "pymetis ; platform_system != 'Windows'",
     "pyproj",
     "pyshp",
-    "python-dateutil >=2.4.0",
     "pyvista",
     "rasterio",
     "rasterstats",