diff --git a/docs/requirements.txt b/docs/requirements.txt
index fd7a687..9a0e850 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,6 +1,6 @@
 alabaster==0.7.10
 attrs==17.4.0
-Babel==2.5.3
+Babel==2.9.1
 boto==2.48.0
 boto3==1.7.10
 botocore==1.10.10