diff --git a/Android/MMKV/build.gradle b/Android/MMKV/build.gradle
index 8411b9f5..6206b3c1 100644
--- a/Android/MMKV/build.gradle
+++ b/Android/MMKV/build.gradle
@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.4.10'
+    ext.kotlin_version = '1.4.21'
 
     repositories {
         google()
diff --git a/POSIX/golang/mmkv.go b/POSIX/golang/mmkv.go
index 4f34e852..29ec76b8 100644
--- a/POSIX/golang/mmkv.go
+++ b/POSIX/golang/mmkv.go
@@ -73,6 +73,16 @@ type MMBuffer struct {
 	length int
 }
 
+// the address of underlying memory
+func (buffer MMBuffer) Pointer() uintptr {
+	return buffer.ptr
+}
+
+// the size of underlying memory
+func (buffer MMBuffer) Length() int {
+	return buffer.length
+}
+
 // get byte slice view of underlying memory
 // the slice is valid as long as MMBuffer.Destroy() not called
 func (buffer MMBuffer) ByteSliceView() []byte {