diff --git a/readthedocs.yml b/readthedocs.yml
index 334b907..b7d3ae5 100644
--- a/readthedocs.yml
+++ b/readthedocs.yml
@@ -5,3 +5,4 @@ build:
 python:
   version: 3.6
   setup_py_install: false
+  pip_install: true