diff --git a/.readthedocs.yml b/.readthedocs.yml
index edd98c3..1fe041e 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -4,6 +4,10 @@
 
 # Required
 version: 2
+build:
+  os: ubuntu-20.04
+  tools:
+    python: "3.8"
 
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
@@ -11,6 +15,5 @@ sphinx:
 
 # Optionally set the version of Python and requirements required to build your docs
 python:
-  version: 3.8
   install:
     - requirements: docs/requirements.txt