diff --git a/onionshare/web.py b/onionshare/web.py
index f67a4b16..68b8fbc2 100644
--- a/onionshare/web.py
+++ b/onionshare/web.py
@@ -32,6 +32,7 @@ import io
 from distutils.version import LooseVersion as Version
 from urllib.request import urlopen
 
+import flask
 from flask import (
     Flask, Response, Request, request, render_template, abort, make_response,
     flash, redirect, __version__ as flask_version
@@ -40,6 +41,15 @@ from werkzeug.utils import secure_filename
 
 from . import strings, common
 
+
+# Stub out flask's show_server_banner function, to avoiding showing warnings that
+# are not applicable to OnionShare
+def stubbed_show_server_banner(env, debug, app_import_path, eager_loading):
+    pass
+
+flask.cli.show_server_banner = stubbed_show_server_banner
+
+
 class Web(object):
     """
     The Web object is the OnionShare web server, powered by flask