diff --git a/.readthedocs.yml b/.readthedocs.yml
index 9152bd4e48b3097f1aac16e7afc9ee0e9b497f47..7c51a5d6c511dea4b259ea0f9a48f3d4bb33ee97 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -1,4 +1,4 @@
 python:
   setup_py_install: true
-  version: 3
+  version: 3.6
 requirements_file: docs-requirements.txt