diff --git a/cert_decoder/main.py b/cert_decoder/main.py
index 79e59ac..a5a6897 100644
--- a/cert_decoder/main.py
+++ b/cert_decoder/main.py
@@ -81,5 +81,6 @@ def index():
 if __name__ == "__main__":
     parser = argparse.ArgumentParser(description="Run SSL Certificate Decoder")
     parser.add_argument('--port', type=int, default=5000, help='Port to run the service on')
+    parser.add_argument('--host', type=str, default='127.0.0.1', help='Host to run the service on')
     args = parser.parse_args()    
-    app.run(debug=True, port=args.port, host='0.0.0.0')
+    app.run(debug=True, port=args.port, host=args.host)