diff --git a/components/lwip/Kconfig b/components/lwip/Kconfig
index d7b2d464d8..98948127e2 100644
--- a/components/lwip/Kconfig
+++ b/components/lwip/Kconfig
@@ -84,7 +84,7 @@ 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 6a587ae24c..39f338547a 160000
--- a/components/lwip/lwip
+++ b/components/lwip/lwip
@@ -1 +1 @@
-Subproject commit 6a587ae24c6667e537f9f78d774edf3d4453d6f5
+Subproject commit 39f338547ab344e855f94eb922421036bee8e417