diff --git a/README.md b/README.md
index d632ad0..3aa9122 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ When that's done, get `binhop` running with something like:
 git clone https://github.com/darrylnixon/binhop.git
 cd binhop
 pip install -r requirements.txt
-./binhop.py
+./binhop.py [--port <port, default: 8080>]
 ```
 
 Once running, browse to [http://localhost:8080](http://localhost:8080) and upload a blob.
diff --git a/binhop.py b/binhop.py
index ccd6435..6480b27 100644
--- a/binhop.py
+++ b/binhop.py
@@ -9,6 +9,7 @@ import os
 from aiohttp_compress import compress_middleware
 from aiohttp import web
 from typing import List, Tuple, Dict, Union
+import argparse
 
 
 async def scan_file(filename: str, base_dir: str) -> List:
@@ -132,6 +133,10 @@ async def serve_static(request: web.Request) -> Union[web.FileResponse, web.HTTP
 
 
 async def main() -> None:
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--port", "-p", type=int, default=8080, help="Port to serve on")
+    args = parser.parse_args()
+
     app = web.Application()
     app.middlewares.append(compress_middleware)
 
@@ -145,10 +150,10 @@ async def main() -> None:
 
     runner = web.AppRunner(app)
     await runner.setup()
-    site = web.TCPSite(runner, "localhost", 8080)
+    site = web.TCPSite(runner, "0.0.0.0", args.port)
     await site.start()
 
-    print("binhop is running at http://localhost:8080")
+    print(f"binhop is running at http://localhost:{args.port}")
     await asyncio.Event().wait()