diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 0c363636..3d3feac4 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -1,4 +1,8 @@
 version: 2
+build:
+  os: ubuntu-20.04
+  tools:
+    python: 3.10
 python:
   install:
     - requirements: requirements/docs.txt