diff --git a/docs/requirements.txt b/docs/requirements.txt
index dc9493b..124479b 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -7,7 +7,7 @@ async-timeout==3.0.1
 attrs==19.3.0
 autobahn==20.6.2
 Automat==20.2.0
-Babel==2.8.0
+Babel==2.9.1
 bokeh==2.0.2
 Brotli==1.0.7
 bson==0.5.8