diff --git a/flaskapi/requirements.txt b/flaskapi/requirements.txt
index 9ed4597..2b412e0 100644
--- a/flaskapi/requirements.txt
+++ b/flaskapi/requirements.txt
@@ -1,7 +1,7 @@
 aniso8601==4.0.1
 asn1crypto==0.24.0
 astroid==1.6.5
-Babel==2.6.0
+Babel==2.9.1
 backports.functools-lru-cache==1.5
 certifi==2018.11.29
 cffi==1.11.5