diff --git a/requirements.txt b/requirements.txt
index 3816b66..f4de7dc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ alabaster==0.7.11
 appnope==0.1.0
 astor==0.7.1
 astroid==2.0.4
-Babel==2.6.0
+Babel==2.9.1
 backcall==0.1.0
 beautifulsoup4==4.6.3
 bibtexparser==1.0.1