diff --git a/fibjs/src/base/Runtime.cpp b/fibjs/src/base/Runtime.cpp
index 8e82ed1e8c..ef7662a0a7 100644
--- a/fibjs/src/base/Runtime.cpp
+++ b/fibjs/src/base/Runtime.cpp
@@ -42,12 +42,12 @@ class ShellArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
 
     virtual void* AllocateUninitialized(size_t length)
     {
-        return malloc(length);
+        return exlib::string::Buffer::New(length)->data();
     }
 
     virtual void Free(void* data, size_t)
     {
-        free(data);
+        exlib::string::Buffer::fromData((char*)data)->unref();
     }
 };
 
diff --git a/vender b/vender
index 256f164991..5617861846 160000
--- a/vender
+++ b/vender
@@ -1 +1 @@
-Subproject commit 256f1649911ea8705ac86db798f2fc53805d3365
+Subproject commit 561786184694a2bba41ac2c11d1a37795b64b845