diff --git a/.readthedocs.yml b/.readthedocs.yaml
similarity index 78%
rename from .readthedocs.yml
rename to .readthedocs.yaml
index ebdbdd63..7fdaad96 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yaml
@@ -2,17 +2,13 @@
 
 version: 2
 
-build:
-  os: "ubuntu-20.04"
-  tools:
-    python: "3.7"
-
 sphinx:
   configuration: WORC/doc/conf.py
 
 formats: []
 
 python:
+  version: 3.7
   install:
     - requirements: requirements.txt
     - method: pip