diff --git a/requirements.txt b/requirements.txt
index 4badee3..0cb212c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -37,7 +37,7 @@ Jinja2==2.9.6
 lazy-object-proxy==1.3.1
 Mako==1.0.7
 MarkupSafe==1.0
-marshmallow==2.13.6
+marshmallow==2.15.1
 marshmallow-sqlalchemy==0.13.1
 mccabe==0.6.1
 paramiko==2.3.1