diff --git a/pkgs/development/python-modules/marshmallow/default.nix b/pkgs/development/python-modules/marshmallow/default.nix
index a4f60d8202a..c08916e4368 100644
--- a/pkgs/development/python-modules/marshmallow/default.nix
+++ b/pkgs/development/python-modules/marshmallow/default.nix
@@ -1,15 +1,16 @@
 { lib
 , buildPythonPackage
-, pythonOlder
 , fetchFromGitHub
 , pytestCheckHook
+, pythonOlder
 , pytz
 , simplejson
 }:
 
 buildPythonPackage rec {
   pname = "marshmallow";
-  version = "3.13.0";
+  version = "3.15.0";
+  format = "setuptools";
 
   disabled = pythonOlder "3.6";
 
@@ -17,7 +18,7 @@ buildPythonPackage rec {
     owner = "marshmallow-code";
     repo = pname;
     rev = version;
-    sha256 = "sha256-tP/RKo2Hzxz2bT7ybRs9wGzq7TpsmzmOPi3BGuSLDA0=";
+    hash = "sha256-ZqMrMNfP/RKW2jQDNPgfhyeqmSc40pZbnrcXHbw2emc=";
   };
 
   checkInputs = [
@@ -31,10 +32,7 @@ buildPythonPackage rec {
   ];
 
   meta = with lib; {
-    description = ''
-      A lightweight library for converting complex objects to and from
-      simple Python datatypes.
-    '';
+    description = "Library for converting complex objects to and from simple Python datatypes";
     homepage = "https://github.com/marshmallow-code/marshmallow";
     license = licenses.mit;
     maintainers = with maintainers; [ cript0nauta ];