diff --git a/arduino-cli.yaml b/arduino-cli.yaml
index b7b1622..cfbe258 100644
--- a/arduino-cli.yaml
+++ b/arduino-cli.yaml
@@ -2,3 +2,4 @@ board_manager:
   additional_urls:
   - https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
   - https://raw.githubusercontent.com/RAKwireless/RAKwireless-Arduino-BSP-Index/main/package_rakwireless_index.json
+  - http://unsigned.io/arduino/package_unsignedio_UnsignedBoards_index.json