diff --git a/.drone.yml b/.drone.yml
index 668b354..898611e 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -24,7 +24,7 @@ steps:
       - arduino-cli version
       # ESP32 パッケージインデックスの更新と 2.0.14 のインストール
       - arduino-cli config init --overwrite
-      - arduino-cli config set board_manager.additional_urls https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
+      - arduino-cli config set board_manager.additional_urls https://dl.espressif.com/dl/package_esp32_index.json
       - arduino-cli core update-index
       - arduino-cli core install esp32:esp32@2.0.14
       # ライブラリのインストール