diff --git a/.readthedocs.yml b/.readthedocs.yml
index 760a6cd..01a1aa9 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -1,9 +1,9 @@
 version: 2
 
 build:
-  os: ubuntu-22.04
+  os: ubuntu-20.04
   tools:
-    python: "3.8"
+    python: "3.7"
 
 sphinx:
   configuration: docs/conf.py