diff --git a/readthedocs.yml b/readthedocs.yml
index d98bf51..799b9a2 100644
--- a/readthedocs.yml
+++ b/readthedocs.yml
@@ -1,6 +1,9 @@
 version: 2
 
 build:
+   os: ubuntu-20.04
+   tools:
+      python: 3.10
    image: latest
 
 python: