diff --git a/requirements.txt b/requirements.txt
index 6787a40..74894df 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 alabaster==0.7.10
 appnope==0.1.0
 astroid==1.5.3
-Babel==2.5.1
+Babel==2.9.1
 bleach==1.5.0
 certifi==2017.11.5
 chardet==3.0.4