diff --git a/pkgs/development/python-modules/flask-marshmallow/default.nix b/pkgs/development/python-modules/flask-marshmallow/default.nix
index 0be4e2ffe251..be74af2d5f9a 100644
--- a/pkgs/development/python-modules/flask-marshmallow/default.nix
+++ b/pkgs/development/python-modules/flask-marshmallow/default.nix
@@ -12,7 +12,7 @@
 
 buildPythonPackage rec {
   pname = "flask-marshmallow";
-  version = "1.1.0";
+  version = "1.2.0";
   pyproject = true;
 
   disabled = pythonOlder "3.8";
@@ -21,7 +21,7 @@ buildPythonPackage rec {
     owner = "marshmallow-code";
     repo = "flask-marshmallow";
     rev = "refs/tags/${version}";
-    hash = "sha256-+5L4OfBRMkS6WRXT7dI/uuqloc/PZgu+DFvOCinByh8=";
+    hash = "sha256-QoktZcyVJXkHr8fCVYt3ZkYq52nxCsZu+AgaDyrZHWs=";
   };
 
   nativeBuildInputs = [