diff --git a/requirements.txt b/requirements.txt
index 44fb99c..4c5bd53 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ appdirs==1.4.3
 asn1crypto==0.22.0
 astroid==1.4.9
 astropy==1.3.2
-Babel==2.4.0
+Babel==2.9.1
 backports-abc==0.5
 backports.shutil-get-terminal-size==1.0.0
 backports.weakref==1.0rc1