diff --git a/requirements.txt b/requirements.txt
index 8d8e06b..9c8f458 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ Flask-Login==0.2.2
 Flask-SQLAlchemy==0.16
 Flask-WTF==0.8.3
 Flask-Babel==0.9
-Babel==1.3
+Babel==2.9.1
 Flask-BabelEx==0.9.1
 ims-lti-py==0.5
 oauth2==1.5.211