diff --git a/docs/website/requirements.txt b/docs/website/requirements.txt
index 8ff20d5d55..426bde8b41 100644
--- a/docs/website/requirements.txt
+++ b/docs/website/requirements.txt
@@ -1,5 +1,5 @@
 alabaster==0.7.10
-Babel==2.5.3
+Babel==2.9.1
 certifi==2017.11.5
 chardet==3.0.4
 CommonMark==0.5.4