diff --git a/requirements-readthedocs.txt b/requirements-readthedocs.txt
index 81800f37..7b178a36 100644
--- a/requirements-readthedocs.txt
+++ b/requirements-readthedocs.txt
@@ -1,2 +1,3 @@
 mkdocs==1.1.2
 sphinx-rtd-theme==0.5.0rc1
+readthedocs-sphinx-search