diff --git a/app.py b/app.py
index f64c9e7..4dbe155 100644
--- a/app.py
+++ b/app.py
@@ -3,11 +3,13 @@
 
 app = Flask(__name__)
 
+
 @app.route('/')
 def hello():
     return 'Hello World!'
 
+
 if __name__ == '__main__':
     # Bind to PORT if defined, otherwise default to 5000.
     port = int(os.environ.get('PORT', 5000))
-    app.run(host='0.0.0.0', port=port)
\ No newline at end of file
+    app.run(host='0.0.0.0', port=port)
diff --git a/requirements.txt b/requirements.txt
index 0382aa2..242abb5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,7 @@
-Flask==0.9
-Jinja2==2.6
-Werkzeug==0.8.3
-wsgiref==0.1.2
+Flask
+itsdangerous
+Jinja2
+MarkupSafe
+Werkzeug
+
+