diff --git a/environment.yml b/environment.yml
index ed9f4ad6..5cede6d2 100644
--- a/environment.yml
+++ b/environment.yml
@@ -18,5 +18,6 @@ dependencies:
   - nbstripout
   - black
   - black-jupyter
+  - pooch
   - pip:
     - ./pygments_style