diff --git a/ev/docs/requirements.txt b/ev/docs/requirements.txt
index 1b30e6fd..f1af0ad9 100644
--- a/ev/docs/requirements.txt
+++ b/ev/docs/requirements.txt
@@ -3,7 +3,7 @@ Jinja2==2.9.6
 MarkupSafe==1.0
 Pygments==2.2.0
 alabaster==0.7.10
-babel==2.4.0
+babel==2.9.1
 docutils==0.14
 gitdb==0.6.4
 imagesize==0.7.1