diff --git a/setup.py b/setup.py
index 5728ed58..71f8be23 100644
--- a/setup.py
+++ b/setup.py
@@ -50,7 +50,7 @@ install_requires = [
     'six==1.10.0',
     'gunicorn==19.7.0',
     'marshmallow-sqlalchemy==0.12.1',
-    'marshmallow==2.13.3',
+    'marshmallow==2.13.4',
     'cryptography==1.7',
     'pyjwt==1.4.2',
     'xmltodict==0.10.2',