diff --git a/env-dev.yml b/env-dev.yml
index d1bc7a3..96d73f7 100644
--- a/env-dev.yml
+++ b/env-dev.yml
@@ -25,6 +25,7 @@ dependencies:
   - scipy
   - shapely
   - siphon
+  - sphinx
   - synopticpy
   - typing-extensions
   - xarray