我正在尝试将一个烧瓶应用程序推到Heroku上，但我一直收到这个错误，我不知道如何修复：
remote: Exception:
remote: Traceback (most recent call last):
remote: File "/app/.heroku/python/lib/python3.4/site-packages/pip-6.1.1-py3.4.egg/pip/basecommand.py", line 246, in main
remote: status = self.run(options, args)
remote: File "/app/.heroku/python/lib/python3.4/site-packages/pip-6.1.1-py3.4.egg/pip/commands/install.py", line 342, in run
remote: requirement_set.prepare_files(finder)
remote: File "/app/.heroku/python/lib/python3.4/site-packages/pip-6.1.1-py3.4.egg/pip/req/req_set.py", line 345, in prepare_files
remote: functools.partial(self._prepare_file, finder))
remote: File "/app/.heroku/python/lib/python3.4/site-packages/pip-6.1.1-py3.4.egg/pip/req/req_set.py", line 290, in _walk_req_to_install
remote: more_reqs = handler(req_to_install)
remote: File "/app/.heroku/python/lib/python3.4/site-packages/pip-6.1.1-py3.4.egg/pip/req/req_set.py", line 467, in _prepare_file
remote: req_to_install.populate_link(finder, self.upgrade)
remote: File "/app/.heroku/python/lib/python3.4/site-packages/pip-6.1.1-py3.4.egg/pip/req/req_install.py", line 251, in populate_link
remote: self.link = finder.find_requirement(self, upgrade)
remote: File "/app/.heroku/python/lib/python3.4/site-packages/pip-6.1.1-py3.4.egg/pip/index.py", line 425, in find_requirement
remote: all_versions = self._find_all_versions(req.name)
remote: File "/app/.heroku/python/lib/python3.4/site-packages/pip-6.1.1-py3.4.egg/pip/index.py", line 378, in _find_all_versions
remote: for page in self._get_pages(locations, project_name):
remote: File "/app/.heroku/python/lib/python3.4/site-packages/pip-6.1.1-py3.4.egg/pip/index.py", line 579, in _get_pages
remote: page = self._get_page(location)
remote: File "/app/.heroku/python/lib/python3.4/site-packages/pip-6.1.1-py3.4.egg/pip/index.py", line 789, in _get_page
remote: return HTMLPage.get_page(link, session=self.session)
remote: File "/app/.heroku/python/lib/python3.4/site-packages/pip-6.1.1-py3.4.egg/pip/index.py", line 878, in get_page
remote: "Cache-Control": "max-age=600",
remote: File "/app/.heroku/python/lib/python3.4/site-packages/pip-6.1.1-py3.4.egg/pip/_vendor/requests/sessions.py", line 476, in get
remote: return self.request('GET', url, **kwargs)
remote: File "/app/.heroku/python/lib/python3.4/site-packages/pip-6.1.1-py3.4.egg/pip/download.py", line 367, in request
remote: return super(PipSession, self).request(method, url, *args, **kwargs)
remote: File "/app/.heroku/python/lib/python3.4/site-packages/pip-6.1.1-py3.4.egg/pip/_vendor/requests/sessions.py", line 450, in request
remote: prep = self.prepare_request(req)
remote: File "/app/.heroku/python/lib/python3.4/site-packages/pip-6.1.1-py3.4.egg/pip/_vendor/requests/sessions.py", line 381, in prepare_request
remote: hooks=merge_hooks(request.hooks, self.hooks),
remote: File "/app/.heroku/python/lib/python3.4/site-packages/pip-6.1.1-py3.4.egg/pip/_vendor/requests/models.py", line 304, in prepare
remote: self.prepare_url(url, params)
remote: File "/app/.heroku/python/lib/python3.4/site-packages/pip-6.1.1-py3.4.egg/pip/_vendor/requests/models.py", line 361, in prepare_url
remote: "Perhaps you meant http://{0}?".format(url))
remote: pip._vendor.requests.exceptions.MissingSchema: Invalid URL './wheelhouse': No schema supplied. Perhaps you meant http://./wheelhouse?
即使我多次尝试升级pip，我也明白了这一点：
您正在使用pip版本6.1.1，但版本8.0.3可用。
有关该怎么做的任何建议？