diff --git a/app/api/blueprint.py b/app/api/blueprint.py
index 25a543c..488e8ec 100644
--- a/app/api/blueprint.py
+++ b/app/api/blueprint.py
@@ -1,9 +1,11 @@
 from flask_restful import Api
 from marshmallow import ValidationError
-from flask import Blueprint
+from flask import Blueprint, jsonify
 
 
 api_bp = Blueprint('api', __name__)
+
+
 api = Api(api_bp)
 
 
@@ -79,12 +81,18 @@ add_resources()
 @api_bp.errorhandler(ValidationError)
 @api_bp.errorhandler(422)
 def handle_validation_error(e):
-    return {'status': 'error', 'message': str(e)}, 422
+    return jsonify({'status': 'error', 'message': str(e)}), 422
+
+
+@api_bp.errorhandler(ValueError)
+def handle_value_error(e):
+    return jsonify({'status': 'error', 'message': str(e)}), 422
 
 
 @api_bp.errorhandler(Exception)
+@api_bp.errorhandler(500)
 def handle_unknown_errors(e):
-    return ({
+    return jsonify({
         'status': 'failed',
         'message': 'Unknown error has occurred! ({0})'.format(str(e))
-        }, 500)
+        }), 500
diff --git a/app/core.py b/app/core.py
index 32002f2..bda72ff 100644
--- a/app/core.py
+++ b/app/core.py
@@ -1,5 +1,5 @@
 # App initialization
-from flask_api import FlaskAPI
+from flask import Flask
 from flask_sqlalchemy import SQLAlchemy
 from flask_bcrypt import Bcrypt
 from flask_mail import Mail
@@ -7,7 +7,7 @@ from flasgger import Swagger
 from flask_cors import CORS
 from .tasks import celery_configurator
 
-app = FlaskAPI(__name__, instance_relative_config=True)
+app = Flask(__name__, instance_relative_config=True)
 app.config.from_object('config')
 app.config.from_pyfile('config.py', silent=True)
 db = SQLAlchemy(app)
diff --git a/requirements.txt b/requirements.txt
index 0ccdb5a..171b2e1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,6 @@ cffi==1.11.5
 click==6.7
 flasgger==0.8.3
 Flask==1.0.2
-Flask-API==1.0
 Flask-Bcrypt==0.7.1
 Flask-Cors==3.0.4
 Flask-Mail==0.9.1