diff --git a/components/lwip/Kconfig b/components/lwip/Kconfig
index e1c3b70d2..d50d5c2e4 100644
--- a/components/lwip/Kconfig
+++ b/components/lwip/Kconfig
@@ -107,7 +107,7 @@ menu "LWIP"
 
     config LWIP_IP_FRAG
         bool "Enable fragment outgoing IP packets"
-        default n
+        default y
         help
             Enabling this option allows fragmenting outgoing IP packets if their size
             exceeds MTU.
diff --git a/components/lwip/lwip b/components/lwip/lwip
index 31e24ae95..b4eaf11fe 160000
--- a/components/lwip/lwip
+++ b/components/lwip/lwip
@@ -1 +1 @@
-Subproject commit 31e24ae95a59e51d74f435f48fa21091b26c1430
+Subproject commit b4eaf11fe5e980a2d9b655e6617d4163c11465ec