diff --git a/docs/readthedocs.yml b/docs/readthedocs.yml
index ec774c720..893e91364 100644
--- a/docs/readthedocs.yml
+++ b/docs/readthedocs.yml
@@ -1,3 +1,4 @@
 python:
     version: 3.5
     pip_install: true
+requirements_file: null