diff --git a/.readthedocs.yml b/.readthedocs.yml
index 72b722d3..1f80cc05 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -5,7 +5,11 @@ sphinx:
 
 formats: all
 
+build:
+  os: ubuntu-20.04
+  tools:
+    python: '3.10'
+
 python:
-  version: 3.10
   install:
     - requirements: docs/requirements.txt