diff --git a/.ci_support/environment-docs.yml b/.ci_support/environment-docs.yml
index b61d9a6b..5599cc26 100644
--- a/.ci_support/environment-docs.yml
+++ b/.ci_support/environment-docs.yml
@@ -13,3 +13,4 @@ dependencies:
 - flux-core
 - jupyter-book =1.0.0
 - h5py =3.12.1
+- python =3.12