diff --git a/docs/readthedocs.yml b/docs/readthedocs.yml
index 117a1e3cad..862bd3971c 100644
--- a/docs/readthedocs.yml
+++ b/docs/readthedocs.yml
@@ -1,2 +1,3 @@
 python:
     version: 3.5
+requirements_file: requirements.txt