diff --git a/readthedocs.yml b/readthedocs.yml
index 176c4bf60..d7245f77f 100644
--- a/readthedocs.yml
+++ b/readthedocs.yml
@@ -1,2 +1,5 @@
 conda:
     file: docs/conda_env.yml
+python:
+    version: 3
+    setup_py_install: true