diff --git a/src/index.js b/src/index.js
index 8de1e6c..10447af 100644
--- a/src/index.js
+++ b/src/index.js
@@ -6,6 +6,7 @@ import {
   flattenDeep,
   get,
   first,
+  forEach,
   isArray,
   isEmpty,
   includes,
@@ -579,6 +580,19 @@ export const mapErrorToObject = (error, options = {}) => {
     description,
   } = mergeObjects(options);
 
+  // normalize errors bag
+  const bagify = (errors = {}) => {
+    const bag = {};
+    // simplify error bag
+    forEach(errors, (value = {}, key) => {
+      const simple = pick(value, 'message', 'name', 'kind', 'path', 'value');
+      const type = get(value, 'properties.type');
+      bag[key] = mergeObjects(simple, { type });
+    });
+    // return errors bag
+    return bag;
+  };
+
   // prepare error payload
   const body = {};
   body.code = error.code || code;
@@ -586,8 +600,8 @@ export const mapErrorToObject = (error, options = {}) => {
   body.name = error.name || name;
   body.message = error.message || message || STATUS_CODES[code];
   body.description = error.description || description || body.message;
-  body.errors = error.errors || undefined; // error bag
-  body.stack = stack ? error.stack : undefined; // error stack
+  body.errors = error.errors ? bagify(error.errors) : undefined;
+  body.stack = stack ? error.stack : undefined;
 
   // return formatted error response
   return mergeObjects(body);
diff --git a/test/index.spec.js b/test/index.spec.js
index b3066b1..51cae97 100644
--- a/test/index.spec.js
+++ b/test/index.spec.js
@@ -262,15 +262,43 @@ describe('common', () => {
     expect(object.stack).to.exist;
   });
 
-  it('should normalize errors in error instance', () => {
-    const error = new Error();
-    const object = mapErrorToObject(error);
+  it('should normalize errors bag in error instance', () => {
+    const errors = {
+      name: {
+        message: 'Path `name` (John Doe) is not unique.',
+        name: 'ValidatorError',
+        properties: {
+          type: 'unique',
+          path: 'name',
+          value: 'John Doe',
+          message: 'Path `name` (John Doe) is not unique.',
+          reason: 'E11000 duplicate key error collection',
+        },
+        kind: 'unique',
+        path: 'name',
+        value: 'John Doe',
+        reason: 'E11000 duplicate key error collection',
+      },
+    };
+    const error = new Error('Validation Error');
+    error.errors = errors;
+    const object = mapErrorToObject(error, { name: 'ValidationError' });
     expect(object).to.be.eql({
       status: 500,
       code: 500,
       name: 'Error',
-      message: 'Internal Server Error',
-      description: 'Internal Server Error',
+      message: 'Validation Error',
+      description: 'Validation Error',
+      errors: {
+        name: {
+          message: 'Path `name` (John Doe) is not unique.',
+          name: 'ValidatorError',
+          type: 'unique',
+          kind: 'unique',
+          path: 'name',
+          value: 'John Doe',
+        },
+      },
     });
   });
 });