diff --git a/requirements.txt b/requirements.txt
index 02ad3d9..c12f434 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ alabaster==0.7.11
 astroid==1.6.5
 atomicwrites==1.1.5
 attrs==18.1.0
-Babel==2.6.0
+Babel==2.9.1
 backports.functools-lru-cache==1.5
 certifi==2018.8.13
 chardet==3.0.4