diff --git a/.readthedocs.yml b/.readthedocs.yml
index 5b8c128..0c44411 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -3,7 +3,7 @@ version: 2
 build:
   os: ubuntu-22.04
   tools:
-    python: "3.11"
+    python: "3.9"
 
 python:
     install: