diff --git a/README.md b/README.md
index b5ddbba..9443055 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,7 @@
 # tools
 
+## APK debuggable 
+
+Fork from [APK debuggable](https://github.com/benjamin-luescher/apk-debuggable). Since `sed` behaves differently depending on the GNU or BSD/ macOS version, the script has been modified to work on both Linux and macOS.
+
+**Warnign:** It is possible that runtime errors occur and the script needs minor modifications for specific apps.  
diff --git a/apk-debuggable b/apk-debuggable
new file mode 160000
index 0000000..86d8393
--- /dev/null
+++ b/apk-debuggable
@@ -0,0 +1 @@
+Subproject commit 86d8393dd46f9046916f2a8667bc6864e133066a