diff --git a/requirements.txt b/requirements.txt
index 1b7d9da..731b55a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ asn1crypto==0.24.0
 astroid==1.6.1
 astropy==2.0.3
 attrs==17.4.0
-Babel==2.5.3
+Babel==2.9.1
 backports.shutil-get-terminal-size==1.0.0
 beautifulsoup4==4.6.0
 bioservices==1.6.0