diff --git a/python_requirements.txt b/python_requirements.txt
index a668bd1..a41db80 100644
--- a/python_requirements.txt
+++ b/python_requirements.txt
@@ -10,7 +10,7 @@ astroid==2.1.0
 astropy==3.1
 atomicwrites==1.2.1
 attrs==18.2.0
-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