diff --git a/requirements.txt b/requirements.txt
index 5326c1a..634a44b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -83,7 +83,7 @@ luigi==3.0.2
 Mako==1.1.3
 Markdown==2.6.11
 MarkupSafe==1.1.1
-marshmallow==2.21.0
+marshmallow==3.18.0
 marshmallow-enum==1.5.1
 marshmallow-sqlalchemy==0.23.1
 mccabe==0.6.1
diff --git a/requirements_all.txt b/requirements_all.txt
index 84729cd..fc75558 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -80,7 +80,7 @@ luigi==3.0.2
 Mako==1.1.3
 Markdown==2.6.11
 MarkupSafe==1.1.1
-marshmallow==2.21.0
+marshmallow==3.18.0
 marshmallow-enum==1.5.1
 marshmallow-sqlalchemy==0.23.1
 mccabe==0.6.1