diff --git a/docs/requirements.txt b/docs/requirements.txt
index eab9175e..ee259aa0 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -10,3 +10,4 @@ sphinx-panels
 toml
 myst_nb
 sphinx_copybutton
+pydata-sphinx-theme==0.13.1