diff --git a/src/kcptun b/src/kcptun
index 87479ab..b2d702f 160000
--- a/src/kcptun
+++ b/src/kcptun
@@ -1 +1 @@
-Subproject commit 87479ab12e2c729564e1210a058984ae96e0d9b6
+Subproject commit b2d702ff5e51cd62814f9046637baa5178452091