diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2d7dcd5..c4d5f47 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -20,6 +20,7 @@ jobs:
       - uses: actions/checkout@v4
       - name: restore
         run: |
+          sudo apt-get update
           sudo apt-get install -y libgtest-dev
       - name: build
         env: