diff --git a/README.rst b/README.rst
index 905680d..c49db74 100644
--- a/README.rst
+++ b/README.rst
@@ -194,7 +194,7 @@ Or run it directly:
 
 .. code:: bash
 
-    $ python -m httpbin.core
+    $ python -m httpbin.core [--port=PORT] [--host=HOST]
 
 Changelog
 ---------
diff --git a/httpbin/core.py b/httpbin/core.py
index 613a7c3..cf3fd6c 100644
--- a/httpbin/core.py
+++ b/httpbin/core.py
@@ -13,6 +13,7 @@ import os
 import random
 import time
 import uuid
+import argparse
 
 from flask import Flask, Response, request, render_template, redirect, jsonify as flask_jsonify, make_response, url_for
 from werkzeug.datastructures import WWWAuthenticate, MultiDict
@@ -709,4 +710,8 @@ def xml():
 
 
 if __name__ == '__main__':
-    app.run()
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--port", type=int, default=5000)
+    parser.add_argument("--host", default="127.0.0.1")
+    args = parser.parse_args()
+    app.run(port=args.port, host=args.host)