diff --git a/requirements.txt b/requirements.txt
index abdedbd..c3f8af6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ appnope==0.1.0
 appscript==1.0.1
 argcomplete==1.0.0
 astropy==1.1.2
-Babel==2.2.0
+Babel==2.9.1
 backports-abc==0.4
 backports.shutil-get-terminal-size==1.0.0
 backports.ssl-match-hostname==3.4.0.2