With the Raven client it is possible to specify a custom CA bundle by appending the ca_cert parameter to the DSN. This is important for use of the client with on-premise installations of Sentry that use certificates signed by a custom CA. Sadly, looking at sentry_sdk.transport._make_pool, it seems this value is now hard-coded to certifi.where(). In result, users that previously used the ca_cert parameter are forced to stay on the Raven client. Thus, it would be great if you could (re-)add this feature.