diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 2139e2f..5946952 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -8,7 +8,7 @@ version: 2
 build:
   os: ubuntu-22.04
   tools:
-    python: "3.11"
+    python: "3.9.7"
 
 mkdocs:
   configuration: mkdocs.yml