diff --git a/lib/lwip b/lib/lwip
index 159e31b689..6ca936f6b5 160000
--- a/lib/lwip
+++ b/lib/lwip
@@ -1 +1 @@
-Subproject commit 159e31b689577dbf69cf0683bbaffbd71fa5ee10
+Subproject commit 6ca936f6b588cee702c638eee75c2436e6cf75de