diff --git a/requirements.txt b/requirements.txt
index 4943ab5..524c24e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -54,7 +54,7 @@ kombu==4.0.2
 lazy-object-proxy==1.4.2
 lockfile==0.12.2
 MarkupSafe==1.1.1
-marshmallow==2.13.0
+marshmallow==2.15.1
 marshmallow-sqlalchemy==0.12.1
 matplotlib==3.0.3
 metabolitics==0.0.12