diff --git a/.github/workflows/immortalwrt_R3P.yml b/.github/workflows/immortalwrt_R3P.yml
index 2eb26b7..338ac22 100644
--- a/.github/workflows/immortalwrt_R3P.yml
+++ b/.github/workflows/immortalwrt_R3P.yml
@@ -13,7 +13,7 @@ on:
 
 env:
   REPO_URL: https://github.com/immortalwrt/immortalwrt
-  REPO_BRANCH: master
+  REPO_BRANCH: openwrt-18.06
   FEEDS_CONF: immortalwrt/R3P/feeds.conf.default
   CONFIG_FILE: immortalwrt/R3P/.config
   DIY_P1_SH: immortalwrt/R3P/diy-part1.sh