diff --git a/docs/environment.yml b/docs/environment.yml
index 39caad7..c9ee212 100644
--- a/docs/environment.yml
+++ b/docs/environment.yml
@@ -11,6 +11,7 @@ dependencies:
   - versioneer
   - sphinx>=7
   - pygments
+  - pyyaml
   - pip
   - pip:
       - dask-sphinx-theme>=4