diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 943372c..ce66cbe 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -4,7 +4,7 @@ sphinx:
   configuration: docs/conf.py
 
 python:
-  version: "3.9"
+  version: "3.8"
   install:
   - method: pip
     path: .