diff --git a/fw_updater_packer_by_shankerzhiwu/README.md b/fw_updater_packer_by_shankerzhiwu/README.md
index ee3f4b1..4a36bc5 100644
--- a/fw_updater_packer_by_shankerzhiwu/README.md
+++ b/fw_updater_packer_by_shankerzhiwu/README.md
@@ -13,3 +13,7 @@ Therefore, the hacking process requires the user to actually log into the diagno
 To make a PKG, just edit scripts in `FwUpdater` and then type `make`.
 
 NOTE: with this script that packs a legit PKG, potentially you can do ANYTHING to any DPT system (e.g., change diagnosis password etc.). Therefore, do TEST your script before you make one and release it.
+
+# Note
+
+Absolutely do NOT decompile the PKG made by this script with [the tools here](https://github.com/HappyZ/dpt-tools/tree/master/fw_updater_packer_unpacker), as it may damage your system.