diff --git a/requirements.txt b/requirements.txt
index 38e7db1..9436745 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ asn1crypto==0.24.0
 astroid==1.6.3
 astropy==3.0.2
 attrs==18.1.0
-Babel==2.5.3
+Babel==2.9.1
 backcall==0.1.0
 backports.shutil-get-terminal-size==1.0.0
 beautifulsoup4==4.6.0