diff --git a/requirements.txt b/requirements.txt
index 2da398c..844dec4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 alabaster==0.7.11
 argh==0.26.2
-Babel==2.6.0
+Babel==2.9.1
 certifi==2018.4.16
 chardet==3.0.4
 docutils==0.14