diff --git a/Compile-keyboard-bootloader.md b/Compile-keyboard-bootloader.md
index 3c5da7f..d78e200 100644
--- a/Compile-keyboard-bootloader.md
+++ b/Compile-keyboard-bootloader.md
@@ -35,7 +35,7 @@ srec_cat bootloader_only_binaries/generic_boot20_pc13.bin -Binary -offset 0x0800
 
 # Flash Arudino 
 ## Arduino IDE
-* add stm32duino pacakage index in **Preference panel** : http://dan.drown.org/stm32duino/package_STM32duino_index.json  and install STM32F1xx/GD32F1xx boards
+* add stm32duino pacakage index in **Preference panel** : http://dan.drown.org/stm32duino/package_STM32duino_index.json as **Additional Boards Manager URLs:** and install STM32F1xx/GD32F1xx boards
 
 ![image](https://user-images.githubusercontent.com/523580/192198944-fd0fbf55-0977-42bb-9256-f7bcdf331466.png)