diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 103b50a5c3f593c3936d7e88e13cf0b61244fb9d..cbf23382b3de4131342664f0b95b397b18816e68 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -1,5 +1,9 @@
 version: 2
 
+build:
+  os: ubuntu-20.04
+  tools:
+    python: "3.10"
 python:
   install:
     - requirements: ./requirements.txt