diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ec95543..30cff1a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,9 +22,9 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
-      - uses: jdx/mise-action@v5
+      - uses: jdx/mise-action@f5be966e4a917d54244728e6a5fdcd1d93a35e6c # v5.2.6
         with:
           cache: true
 
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index db1d015..399a2d1 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -29,13 +29,13 @@ jobs:
       # default GITHUB_TOKEN) so CI runs on the PR without a manual approval
       # gate. Best-effort: falls back to GITHUB_TOKEN when the App secrets or
       # installation are absent.
-      - uses: actions/create-github-app-token@v3
+      - uses: actions/create-github-app-token@64ab729a6294000f5aa4a4bc0b73d1f32bc45510 # v3.3.0
         id: app-token
         continue-on-error: true
         with:
           app-id: ${{ secrets.RELEASE_APP_ID }}
           private-key: ${{ secrets.RELEASE_APP_PRIVATE_KEY }}
-      - uses: googleapis/release-please-action@v5
+      - uses: googleapis/release-please-action@45996ed1f6d02564a971a2fa1b5860e934307cf7 # v5.0.0
         id: rp
         with:
           token: ${{ steps.app-token.outputs.token || secrets.GITHUB_TOKEN }}