diff --git a/requirements.txt b/requirements.txt
index 0eedaa1..9f07c90 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 alabaster==0.7.9
-Babel==2.3.4
+Babel==2.9.1
 certifi==2017.7.27.1
 chardet==3.0.4
 docopt==0.6.2