diff --git a/readthedocs.yml b/readthedocs.yml
index 56c5872..87fa516 100644
--- a/readthedocs.yml
+++ b/readthedocs.yml
@@ -2,4 +2,4 @@ build:
     image: latest
 
 python:
-    version: 3.7
+    version: 3.6