diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 1129a2d..2beb900 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -2,6 +2,11 @@
 
 version: 2
 
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.8"
+
 sphinx:
   configuration: docs/source/conf.py
   builder: html