diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index aff41b4cf..44b41b104 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -1,6 +1,7 @@
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
 version: 2
 build:
+  os: ubuntu-22.04
   apt_packages:
     - coinor-cbc
 sphinx: