diff --git a/.github/workflows/actionlint.dockerfile b/.github/workflows/actionlint.dockerfile
index 4a299c46d..0c1e6d642 100644
--- a/.github/workflows/actionlint.dockerfile
+++ b/.github/workflows/actionlint.dockerfile
@@ -1,4 +1,4 @@
 # Workaround for https://github.com/dependabot/dependabot-core/issues/8362.
 # Once that is fixed, remove this file and replace the Docker build and run
 # lines in `.github/workflows/main.yml` with a `uses: docker://rhysd/…` line.
-FROM rhysd/actionlint:1.7.4@sha256:82244e1db1c60d82c7792180a48dd0bcb838370bb589d53ff132503fc9485868
+FROM rhysd/actionlint:1.7.7@sha256:887a259a5a534f3c4f36cb02dca341673c6089431057242cdc931e9f133147e9