diff --git a/.readthedocs.yml b/.readthedocs.yml
index 63d059cec..3c6a1008e 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -9,6 +9,7 @@ sphinx:
   fail_on_warning: true
 
 python:
+  version: 3.8
   install:
     - method: pip
       path: .