diff --git a/.readthedocs.yml b/.readthedocs.yml
index 77cb8226..02b1d464 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -12,9 +12,13 @@ sphinx:
 formats:
   - pdf
 
+build:
+  os: "ubuntu-22.04"
+  tools:
+    python: "3.9"
+
 # Optionally set the version of Python and requirements required to build your docs
 python:
-  version: 3.8
   install:
     - method: pip
       path: .