diff --git a/creality-ender3/README.md b/creality-ender3/README.md
index ef5b05a..a5efe2b 100644
--- a/creality-ender3/README.md
+++ b/creality-ender3/README.md
@@ -166,6 +166,13 @@ Final result:
 
 # Marlin custom firmware
 
+## :warning: Notice :warning:
+
+I upgraded my Ender 3 printer with [BIGTREETECH SKR MINI E3 V2](https://www.aliexpress.com/item/4001050145015.html) mainboard.
+
+Firmware above is built for this mainboard!
+
+
 ## Installed firmware
 
 - Currently used tag: [`2.1.2.4`](https://github.com/MarlinFirmware/Marlin/tree/2.1.2.4)