diff --git a/application-templates/javascript/event/src/middleware/error.middleware.js b/application-templates/javascript/event/src/middleware/error.middleware.js
index ce83655..722bb95 100644
--- a/application-templates/javascript/event/src/middleware/error.middleware.js
+++ b/application-templates/javascript/event/src/middleware/error.middleware.js
@@ -1,18 +1,17 @@
 import CustomError from '../errors/custom.error.js';
 
 export const errorMiddleware = (error, _req, res) => {
+  const isDevelopment = process.env.NODE_ENV === 'development';
+
   if (error instanceof CustomError) {
-    if (typeof error.statusCode === 'number') {
-      res.status(error.statusCode).json({
-        message: error.message,
-        errors: error.errors,
-        stack: process.env.NODE_ENV === 'development' ? error.stack : undefined,
-      });
+    res.status(error.statusCode).json({
+      message: error.message,
+      errors: error.errors,
+      stack: isDevelopment ? error.stack : undefined,
+    });
 
-      return;
-    }
+    return;
   }
 
-  res.status(500).send('Internal server error: ' + process.env.NODE_ENV === 'development' ? error.stack : undefined);
-};
-
+  res.status(500).send(isDevelopment ? error : 'Internal server error');
+};
\ No newline at end of file
diff --git a/application-templates/javascript/job/src/middleware/error.middleware.js b/application-templates/javascript/job/src/middleware/error.middleware.js
index ce83655..722bb95 100644
--- a/application-templates/javascript/job/src/middleware/error.middleware.js
+++ b/application-templates/javascript/job/src/middleware/error.middleware.js
@@ -1,18 +1,17 @@
 import CustomError from '../errors/custom.error.js';
 
 export const errorMiddleware = (error, _req, res) => {
+  const isDevelopment = process.env.NODE_ENV === 'development';
+
   if (error instanceof CustomError) {
-    if (typeof error.statusCode === 'number') {
-      res.status(error.statusCode).json({
-        message: error.message,
-        errors: error.errors,
-        stack: process.env.NODE_ENV === 'development' ? error.stack : undefined,
-      });
+    res.status(error.statusCode).json({
+      message: error.message,
+      errors: error.errors,
+      stack: isDevelopment ? error.stack : undefined,
+    });
 
-      return;
-    }
+    return;
   }
 
-  res.status(500).send('Internal server error: ' + process.env.NODE_ENV === 'development' ? error.stack : undefined);
-};
-
+  res.status(500).send(isDevelopment ? error : 'Internal server error');
+};
\ No newline at end of file
diff --git a/application-templates/javascript/service/src/middleware/error.middleware.js b/application-templates/javascript/service/src/middleware/error.middleware.js
index ce83655..722bb95 100644
--- a/application-templates/javascript/service/src/middleware/error.middleware.js
+++ b/application-templates/javascript/service/src/middleware/error.middleware.js
@@ -1,18 +1,17 @@
 import CustomError from '../errors/custom.error.js';
 
 export const errorMiddleware = (error, _req, res) => {
+  const isDevelopment = process.env.NODE_ENV === 'development';
+
   if (error instanceof CustomError) {
-    if (typeof error.statusCode === 'number') {
-      res.status(error.statusCode).json({
-        message: error.message,
-        errors: error.errors,
-        stack: process.env.NODE_ENV === 'development' ? error.stack : undefined,
-      });
+    res.status(error.statusCode).json({
+      message: error.message,
+      errors: error.errors,
+      stack: isDevelopment ? error.stack : undefined,
+    });
 
-      return;
-    }
+    return;
   }
 
-  res.status(500).send('Internal server error: ' + process.env.NODE_ENV === 'development' ? error.stack : undefined);
-};
-
+  res.status(500).send(isDevelopment ? error : 'Internal server error');
+};
\ No newline at end of file
diff --git a/application-templates/typescript/event/src/middleware/error.middleware.ts b/application-templates/typescript/event/src/middleware/error.middleware.ts
index 75cda75..1315d55 100644
--- a/application-templates/typescript/event/src/middleware/error.middleware.ts
+++ b/application-templates/typescript/event/src/middleware/error.middleware.ts
@@ -4,17 +4,19 @@ import CustomError from '../errors/custom.error';
 export const errorMiddleware: ErrorRequestHandler = (
   error: Error,
   _: Request,
-  res: Response,
+  res: Response
 ) => {
+const isDevelopment = process.env.NODE_ENV === 'development';
+
   if (error instanceof CustomError) {
     res.status(error.statusCode as number).json({
       message: error.message,
       errors: error.errors,
-      stack: process.env.NODE_ENV === 'development' ? error.stack : undefined,
+      stack: isDevelopment ? error.stack : undefined,
     });
 
     return;
   }
 
-  res.status(500).send('Internal server error: ' + process.env.NODE_ENV === 'development' ? error.stack : undefined);
-};
+  res.status(500).send(isDevelopment ? error : 'Internal server error');
+};
\ No newline at end of file
diff --git a/application-templates/typescript/job/src/middleware/error.middleware.ts b/application-templates/typescript/job/src/middleware/error.middleware.ts
index 75cda75..1315d55 100644
--- a/application-templates/typescript/job/src/middleware/error.middleware.ts
+++ b/application-templates/typescript/job/src/middleware/error.middleware.ts
@@ -4,17 +4,19 @@ import CustomError from '../errors/custom.error';
 export const errorMiddleware: ErrorRequestHandler = (
   error: Error,
   _: Request,
-  res: Response,
+  res: Response
 ) => {
+const isDevelopment = process.env.NODE_ENV === 'development';
+
   if (error instanceof CustomError) {
     res.status(error.statusCode as number).json({
       message: error.message,
       errors: error.errors,
-      stack: process.env.NODE_ENV === 'development' ? error.stack : undefined,
+      stack: isDevelopment ? error.stack : undefined,
     });
 
     return;
   }
 
-  res.status(500).send('Internal server error: ' + process.env.NODE_ENV === 'development' ? error.stack : undefined);
-};
+  res.status(500).send(isDevelopment ? error : 'Internal server error');
+};
\ No newline at end of file
diff --git a/application-templates/typescript/service/src/middleware/error.middleware.ts b/application-templates/typescript/service/src/middleware/error.middleware.ts
index 75cda75..1315d55 100644
--- a/application-templates/typescript/service/src/middleware/error.middleware.ts
+++ b/application-templates/typescript/service/src/middleware/error.middleware.ts
@@ -4,17 +4,19 @@ import CustomError from '../errors/custom.error';
 export const errorMiddleware: ErrorRequestHandler = (
   error: Error,
   _: Request,
-  res: Response,
+  res: Response
 ) => {
+const isDevelopment = process.env.NODE_ENV === 'development';
+
   if (error instanceof CustomError) {
     res.status(error.statusCode as number).json({
       message: error.message,
       errors: error.errors,
-      stack: process.env.NODE_ENV === 'development' ? error.stack : undefined,
+      stack: isDevelopment ? error.stack : undefined,
     });
 
     return;
   }
 
-  res.status(500).send('Internal server error: ' + process.env.NODE_ENV === 'development' ? error.stack : undefined);
-};
+  res.status(500).send(isDevelopment ? error : 'Internal server error');
+};
\ No newline at end of file