diff --git a/services/auth/requirements.txt b/services/auth/requirements.txt
index 9f08d80..f3579a0 100644
--- a/services/auth/requirements.txt
+++ b/services/auth/requirements.txt
@@ -12,7 +12,7 @@ kombu==3.0.37
 ipaddress==1.0.18
 Mako==1.0.6
 MarkupSafe==1.0
-marshmallow==2.13.5
+marshmallow==2.15.1
 mock==2.0.0
 nameko==2.6.0
 nameko-sqlalchemy==0.1.0