diff --git a/blasta/__main__.py b/blasta/__main__.py
index ae2d9dc..8a1dc30 100644
--- a/blasta/__main__.py
+++ b/blasta/__main__.py
@@ -57,7 +57,7 @@ if __name__ == 'blasta.__main__':
     parser.add_argument('-p', '--port', help='port number', dest='port')
     parser.add_argument('-o', '--open', help='open an html browser', action='store_const', const=True, dest='open')
     args = parser.parse_args()
-    port = args.port or 8000
+    port = int(args.port or 8000)
     uvicorn.run(app, host='localhost', port=port)
     if args.open:
         # TODO Check first time