diff --git a/setup.py b/setup.py
index d8fa306e..d3138729 100644
--- a/setup.py
+++ b/setup.py
@@ -49,7 +49,7 @@ install_requires = [
     'six==1.10.0',
     'gunicorn==19.6.0',
     'marshmallow-sqlalchemy==0.12.1',
-    'marshmallow==2.11.1',
+    'marshmallow==2.12.1',
     'cryptography==1.7',
     'pyjwt==1.4.2',
     'xmltodict==0.10.2',