diff --git a/docs/requirements.txt b/docs/requirements.txt
index 608355c..c327fee 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,3 +1,3 @@
-sphinx==2.3.1
+sphinx==2.4.0
 sphinx-rtd-theme==0.4.3
 -e .