diff --git a/sahara/api/middleware/sahara_middleware.py b/sahara/api/middleware/sahara_middleware.py
index acfa651ded..95e4dede92 100644
--- a/sahara/api/middleware/sahara_middleware.py
+++ b/sahara/api/middleware/sahara_middleware.py
@@ -43,19 +43,16 @@ def build_app():
     app.register_blueprint(api_v10.rest, url_prefix='/v1.1')
     app.register_blueprint(api_v11.rest, url_prefix='/v1.1')
 
-    class _JSONErrorHandler(dict):
-        def __getitem__(self, ex):
-            status_code = (ex.code
-                           if isinstance(ex, werkzeug_exceptions.HTTPException)
-                           else 500)
-            description = (ex.description
-                           if isinstance(ex, werkzeug_exceptions.HTTPException)
-                           else str(ex))
-            return api_utils.render({'error': status_code,
-                                     'error_message': description},
-                                    status=status_code)
-
-    make_json_error = _JSONErrorHandler()
+    def make_json_error(ex):
+        status_code = (ex.code
+                       if isinstance(ex, werkzeug_exceptions.HTTPException)
+                       else 500)
+        description = (ex.description
+                       if isinstance(ex, werkzeug_exceptions.HTTPException)
+                       else str(ex))
+        return api_utils.render({'error': status_code,
+                                 'error_message': description},
+                                status=status_code)
 
     for code in six.iterkeys(werkzeug_exceptions.default_exceptions):
         app.register_error_handler(code, make_json_error)