diff --git a/flask/requirements.txt b/flask/requirements.txt
index e223fa6..6ee6b51 100644
--- a/flask/requirements.txt
+++ b/flask/requirements.txt
@@ -1,6 +1,6 @@
 alembic==1.0.0
 amqp==2.3.2
-Babel==2.6.0
+Babel==2.9.1
 billiard==3.5.0.4
 blinker==1.4
 celery==4.2.1