Fix failing docs

diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index b7f92082cf97c0e02cee24a6c4a7b82c7e545f98..57764a1ad05c0855c95ea922bdfcdda36c35ac5b 100644 (file)
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -8,8 +8,12 @@
 # Required
 version: 2
 
+build:
+  os: "ubuntu-20.04"
+  tools:
+    python: "3.7"
+
 python:
-  version: "3.7"
   install:
     - requirements: docs/requirements.txt
     - requirements: requirements.txt