diff --git a/pkgs/development/python-modules/flask-sqlalchemy/default.nix b/pkgs/development/python-modules/flask-sqlalchemy/default.nix
index aa7b40675b89..2ff84f2531b0 100644
--- a/pkgs/development/python-modules/flask-sqlalchemy/default.nix
+++ b/pkgs/development/python-modules/flask-sqlalchemy/default.nix
@@ -1,16 +1,16 @@
-{ stdenv, buildPythonPackage, fetchPypi, flask, sqlalchemy, pytest }:
+{ stdenv, buildPythonPackage, fetchPypi, flask, mock, sqlalchemy, pytest }:
 
 buildPythonPackage rec {
   pname = "Flask-SQLAlchemy";
-  version = "2.3.2";
+  version = "2.4.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0lvfynbk9y0whpkhqz7kf3hk342sfa3lwqyv25gnb22q5f2vjwar";
+    sha256 = "0nnllf0ddbh9jlhngnyjj98lbxgxr1csaplllx0caw98syq0k5hc";
   };
 
   propagatedBuildInputs = [ flask sqlalchemy ];
-  checkInputs = [ pytest ];
+  checkInputs = [ mock pytest ];
 
   checkPhase = ''
     pytest