diff --git a/tools/sdk/lib/liblwip2-1460-feat.a b/tools/sdk/lib/liblwip2-1460-feat.a
index 5e6116817a..0449aad489 100644
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diff --git a/tools/sdk/lib/liblwip2-1460.a b/tools/sdk/lib/liblwip2-1460.a
index 79c2d9b300..653733d02e 100644
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diff --git a/tools/sdk/lib/liblwip2-536-feat.a b/tools/sdk/lib/liblwip2-536-feat.a
index 22ba4fda65..8c4cc2b16e 100644
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diff --git a/tools/sdk/lib/liblwip2-536.a b/tools/sdk/lib/liblwip2-536.a
index ffadb88ba5..fa85e3ae18 100644
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diff --git a/tools/sdk/lib/liblwip6-1460-feat.a b/tools/sdk/lib/liblwip6-1460-feat.a
index 6d510eac44..9941317b92 100644
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diff --git a/tools/sdk/lib/liblwip6-536-feat.a b/tools/sdk/lib/liblwip6-536-feat.a
index a42740650c..7173f188b2 100644
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diff --git a/tools/sdk/lwip2/builder b/tools/sdk/lwip2/builder
index c434c6fab1..51b2d6ceec 160000
--- a/tools/sdk/lwip2/builder
+++ b/tools/sdk/lwip2/builder
@@ -1 +1 @@
-Subproject commit c434c6fab1cb7c670cd9a223e6667ec80a618d29
+Subproject commit 51b2d6ceec717e06dc6ef0c839bb1e23809193be
diff --git a/tools/sdk/lwip2/include/lwip-git-hash.h b/tools/sdk/lwip2/include/lwip-git-hash.h
index 97bc111eaf..70bbead2f4 100644
--- a/tools/sdk/lwip2/include/lwip-git-hash.h
+++ b/tools/sdk/lwip2/include/lwip-git-hash.h
@@ -1,5 +1,5 @@
 // generated by makefiles/make-lwip2-hash
 #ifndef LWIP_HASH_H
 #define LWIP_HASH_H
-#define LWIP_HASH_STR "STABLE-2_1_2_RELEASE/glue:1.0-4-gc434c6f"
+#define LWIP_HASH_STR "STABLE-2_1_2_RELEASE/glue:1.0-5-g51b2d6c"
 #endif // LWIP_HASH_H