diff --git a/.github/workflows/github-pages.yml b/.github/workflows/github-pages.yml
index 0878fb2..bf82be6 100644
--- a/.github/workflows/github-pages.yml
+++ b/.github/workflows/github-pages.yml
@@ -12,7 +12,7 @@ jobs:
       id-token: write
     environment: github-pages
     runs-on: ubuntu-latest
-    container: node:lts-alpine
+    container: node:lts-alpine@sha256:9bef0ef1e268f60627da9ba7d7605e8831d5b56ad07487d24d1aa386336d1944
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
       - uses: actions/setup-node@1d0ff469b7ec7b3cb9d8673fde0c81c44821de2a # v4