diff --git a/ext/lwip b/ext/lwip
index b3a9394..3bb5b07 160000
--- a/ext/lwip
+++ b/ext/lwip
@@ -1 +1 @@
-Subproject commit b3a939417e936a933ba287aee79eff8662198cad
+Subproject commit 3bb5b0722ea01edd8dee439ba62eeee788d2894e