diff --git a/ext/lwip b/ext/lwip
index 92f23d6..159e31b 160000
--- a/ext/lwip
+++ b/ext/lwip
@@ -1 +1 @@
-Subproject commit 92f23d6ca0971a32f2085b9480e738d34174417b
+Subproject commit 159e31b689577dbf69cf0683bbaffbd71fa5ee10
diff --git a/ext/lwip-contrib b/ext/lwip-contrib
index 4d18380..35b011d 160000
--- a/ext/lwip-contrib
+++ b/ext/lwip-contrib
@@ -1 +1 @@
-Subproject commit 4d1838043ec8d31ff308fa10326ea8e3a61063cd
+Subproject commit 35b011d4cf4c4b480f8859c456587a884ec9d287