diff --git a/.github/workflows/flakehub-publish-tagged.yml b/.github/workflows/flakehub-publish-tagged.yml
index 9ff12c6a3..50bb8b9f7 100644
--- a/.github/workflows/flakehub-publish-tagged.yml
+++ b/.github/workflows/flakehub-publish-tagged.yml
@@ -20,8 +20,8 @@ jobs:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           ref: "${{ (inputs.tag != null) && format('refs/tags/{0}', inputs.tag) || '' }}"
-      - uses: "DeterminateSystems/nix-installer-action@main"
-      - uses: "DeterminateSystems/flakehub-push@main"
+      - uses: DeterminateSystems/nix-installer-action@786fff0690178f1234e4e1fe9b536e94f5433196 # v20
+      - uses: DeterminateSystems/flakehub-push@71f57208810a5d299fc6545350981de98fdbc860 # v6
         with:
           visibility: "public"
           tag: "${{ inputs.tag }}"