diff --git a/doc/requirements-doc.txt b/doc/requirements-doc.txt
index dcefe0e61..792264dfb 100644
--- a/doc/requirements-doc.txt
+++ b/doc/requirements-doc.txt
@@ -15,7 +15,7 @@ pygments
 pyyaml
 recommonmark
 redis
-sphinx>2
+sphinx==3.0.4
 sphinx-click
 sphinx-copybutton
 sphinx-gallery