diff --git a/ext/lwip-contrib b/ext/lwip-contrib
index a57a8a2..91deef2 160000
--- a/ext/lwip-contrib
+++ b/ext/lwip-contrib
@@ -1 +1 @@
-Subproject commit a57a8a213067912168baf978864a6f1adaacc042
+Subproject commit 91deef22e6519f94e0b07327fc778816e384eb7d