diff --git a/mitmproxy/proxy/layers/tls.py b/mitmproxy/proxy/layers/tls.py
index e0dacff2d..a24a99c1f 100644
--- a/mitmproxy/proxy/layers/tls.py
+++ b/mitmproxy/proxy/layers/tls.py
@@ -1,4 +1,3 @@
-import socket
 import struct
 import time
 from dataclasses import dataclass