from gunicorn.http import wsgi
from functools import wraps

def wrap_default_headers(func):
    @wraps(func)
    def default_headers(*args, **kwargs):
        return [h for h in func(*args, **kwargs) if not h.startswith('Server:')]
    return default_headers

wsgi.Response.default_headers = wrap_default_headers(wsgi.Response.default_headers)