diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 6ee59775d9b87a37aa62dcf5410416e1b83ba08a..4a32aa7f0dc2fc8fcf0e0000b2b01ef807061f81 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -5,8 +5,10 @@
 # Required
 version: 2
 
-#conda:
-#  environment: envINEED_win.yml
+build:
+  os: ubuntu-20.04
+  tools:
+    sphinx: {}
 
 sphinx:
    configuration: docs/source/conf.py