diff --git a/environment.yml b/environment.yml
index 12c7f8e..23f0cfb 100644
--- a/environment.yml
+++ b/environment.yml
@@ -23,9 +23,11 @@ dependencies:
     - pygeogrids
     - pynetcf>=0.5.0
     - more_itertools
-    - sphinx_rtd_theme
     - smecv_grid
     - tqdm
+    # Optional, for documentation and testing
+    - nbconvert
+    - sphinx_rtd_theme
     - yapf
     - pytest
     - pytest-cov