diff --git a/requirements.txt b/requirements.txt
index e1d1c3d..e26538c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ astropy==3.2.1
 atomicwrites==1.2.1
 attrs==18.2.0
 Automat==0.7.0
-Babel==2.6.0
+Babel==2.9.1
 backcall==0.1.0
 backports.os==0.1.1
 backports.shutil-get-terminal-size==1.0.0