diff --git a/jupyter-book/conditions/compositional.yml b/jupyter-book/conditions/compositional.yml
index 029c7b3..c571de9 100644
--- a/jupyter-book/conditions/compositional.yml
+++ b/jupyter-book/conditions/compositional.yml
@@ -5,6 +5,7 @@ channels:
   - bioconda
 dependencies:
   - anaconda::git
+  - conda-forge::python=3.11.9
   - conda-forge::jupyterlab
   - conda-forge::r-statmod
   - r-base