diff --git a/requirements.txt b/requirements.txt
index dda4b38..3ec8d0e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ astropy==1.3.2
 attrs==17.4.0
 Automat==0.6.0
 awscli==1.12.1
-Babel==2.4.0
+Babel==2.9.1
 backports-abc==0.5
 backports.functools-lru-cache==1.4
 backports.shutil-get-terminal-size==1.0.0