diff --git a/components/lwip/Kconfig b/components/lwip/Kconfig
index 4b7d237b54..f03844147d 100644
--- a/components/lwip/Kconfig
+++ b/components/lwip/Kconfig
@@ -92,7 +92,7 @@ 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 c9e3b53c6f..b4eaf11fe5 160000
--- a/components/lwip/lwip
+++ b/components/lwip/lwip
@@ -1 +1 @@
-Subproject commit c9e3b53c6f04052943f97210b858cec805cc98d9
+Subproject commit b4eaf11fe5e980a2d9b655e6617d4163c11465ec