diff --git a/mastodon/__init__.py b/mastodon/__init__.py
index 1be4aba..047ffb7 100644
--- a/mastodon/__init__.py
+++ b/mastodon/__init__.py
@@ -1,5 +1,5 @@
-from mastodon.Mastodon import Mastodon, AttribAccessDict, MastodonError, MastodonVersionError, MastodonIllegalArgumentError, MastodonIOError, MastodonFileNotFoundError, MastodonNetworkError, MastodonAPIError, MastodonNotFoundError, MastodonUnauthorizedError, MastodonRatelimitError, MastodonMalformedEventError, MastodonServerError
+from mastodon.Mastodon import Mastodon, AttribAccessDict, MastodonError, MastodonVersionError, MastodonIllegalArgumentError, MastodonIOError, MastodonFileNotFoundError, MastodonNetworkError, MastodonAPIError, MastodonNotFoundError, MastodonUnauthorizedError, MastodonRatelimitError, MastodonMalformedEventError, MastodonServerError, MastodonInternalServerError, MastodonBadGatewayError, MastodonServiceUnavailableError, MastodonGatewayTimeoutError
 from mastodon.streaming import StreamListener, CallbackStreamListener
 
 __all__ = ['Mastodon', 'AttribAccessDict', 'StreamListener', 'CallbackStreamListener', 'MastodonError', 'MastodonVersionError', 'MastodonIllegalArgumentError', 'MastodonIOError', 'MastodonFileNotFoundError', 'MastodonNetworkError', 'MastodonAPIError', 'MastodonNotFoundError', 'MastodonUnauthorizedError', 'MastodonRatelimitError', 'MastodonMalformedEventError',
-'MastodonServerError']
+'MastodonServerError', 'MastodonInternalServerError', 'MastodonBadGatewayError', 'MastodonServiceUnavailableError', 'MastodonGatewayTimeoutError']