diff --git a/requirements.txt b/requirements.txt
index ca035a5..3f5296a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 alabaster==0.7.10
 apturl==0.5.2
 aspy.yaml==0.2.2
-Babel==2.3.4
+Babel==2.9.1
 beautifulsoup4==4.4.1
 boltkit==1.0.0
 Brlapi==0.6.4