diff --git a/libp2p/stream_muxer/mplex/exceptions.py b/libp2p/stream_muxer/mplex/exceptions.py
index 6ff6cf20..f42c561b 100644
--- a/libp2p/stream_muxer/mplex/exceptions.py
+++ b/libp2p/stream_muxer/mplex/exceptions.py
@@ -1,7 +1,7 @@
 from libp2p.stream_muxer.exceptions import (
+    MuxedConnClosed,
     MuxedConnError,
     MuxedConnShuttingDown,
-    MuxedConnClosed,
     MuxedStreamClosed,
     MuxedStreamEOF,
     MuxedStreamReset,
diff --git a/libp2p/stream_muxer/mplex/mplex.py b/libp2p/stream_muxer/mplex/mplex.py
index 13de4942..589a623f 100644
--- a/libp2p/stream_muxer/mplex/mplex.py
+++ b/libp2p/stream_muxer/mplex/mplex.py
@@ -14,8 +14,8 @@ from libp2p.utils import (
 )
 
 from .constants import HeaderTags
-from .exceptions import MplexClosed, MplexShuttingDown
 from .datastructures import StreamID
+from .exceptions import MplexClosed, MplexShuttingDown
 from .mplex_stream import MplexStream
 
 MPLEX_PROTOCOL_ID = TProtocol("/mplex/6.7.0")