diff --git a/.github/workflows/build-immortalwrt.yml b/.github/workflows/build-immortalwrt.yml
index e6172fb..3451a91 100644
--- a/.github/workflows/build-immortalwrt.yml
+++ b/.github/workflows/build-immortalwrt.yml
@@ -46,6 +46,7 @@ jobs:
       env:
         DEBIAN_FRONTEND: noninteractive
       run: |
+        sudo apt-get update
         sudo -E apt-get -qq install ack antlr3 asciidoc autoconf automake autopoint binutils bison build-essential \
           bzip2 ccache clang clangd cmake cpio curl device-tree-compiler ecj fastjar flex gawk gettext gcc-multilib \
           g++-multilib git gperf haveged help2man intltool lib32gcc-s1 libc6-dev-i386 libelf-dev libglib2.0-dev \