diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index c011984daa..fd0e52242b 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -15,5 +15,6 @@ sphinx:
   configuration: docs/conf.py
 
 python:
+  version: 3.8
   install:
     - requirements: requirements/doc.txt