diff --git a/pkgs/development/python-modules/marshmallow/default.nix b/pkgs/development/python-modules/marshmallow/default.nix
index afc378d4aaa..a7ca14beb94 100644
--- a/pkgs/development/python-modules/marshmallow/default.nix
+++ b/pkgs/development/python-modules/marshmallow/default.nix
@@ -4,7 +4,7 @@
 
 buildPythonPackage rec {
   pname = "marshmallow";
-  version = "3.9.1";
+  version = "3.10.0";
   disabled = isPy27;
 
   meta = {
@@ -18,7 +18,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "73facc37462dfc0b27f571bdaffbef7709e19f7a616beb3802ea425b07843f4e";
+    sha256 = "4ab2fdb7f36eb61c3665da67a7ce281c8900db08d72ba6bf0e695828253581f7";
   };
 
   propagatedBuildInputs = [ dateutil simplejson ];