diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 77ea544e128e27e9fb18617b5c4d7b321272c64b..927e61d82555a8435a0727be917253fced6c9361 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -9,6 +9,11 @@ sphinx:
   configuration: docs/source/conf.py
   fail_on_warning: true
 
+build:
+  os: "ubuntu-20.04"
+  tools:
+    python: "3.10"
+
 python:
   install:
     - method: pip