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EDIT: works with version < 6.x Quick workaround to this bug: ``` from raven.transport.twisted import TwistedHTTPTransport class FixedTwistedHTTPTransport(TwistedHTTPTransport): def __init__(self, parsed_url, *args, **kwargs): super().__init__(parsed_url, *args, **kwargs) # twisted wants bytes...

You are right. I didn't notice that you are talking about 6.x version. I'm using v5.x. The only way is to overload `send_async` or `Agent.request`.