diff --git a/requirements.txt b/requirements.txt
index 9f8a8dd..f834f4c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 absl-py==0.2.0
 alabaster==0.7.11
 astor==0.6.2
-Babel==2.6.0
+Babel==2.9.1
 backcall==0.1.0
 bleach==1.5.0
 certifi==2018.4.16