diff --git a/.github/workflows/backport.yml b/.github/workflows/backport.yml
index 68cc2e6..e37597e 100644
--- a/.github/workflows/backport.yml
+++ b/.github/workflows/backport.yml
@@ -16,4 +16,4 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Create backport pull requests
-        uses: korthout/backport-action@v3
+        uses: korthout/backport-action@be567af183754f6a5d831ae90f648954763f17f5 # v3.1.0
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index a255eb8..f3e3cbf 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -19,7 +19,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Set up Ruby environment
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@2654679fe7f7c29875c669398a8ec0791b8a64a1 # v1.215.0
         with:
           ruby-version: '3.2'
           bundler-cache: true # Enables caching for Bundler
@@ -34,7 +34,7 @@ jobs:
         run: ls -al ${{ github.workspace }}/_site
 
       - name: Deploy via rsync
-        uses: burnett01/rsync-deployments@5.2
+        uses: burnett01/rsync-deployments@3cccb6851148e6198ed9ed89eb0d1c17b5e58cc7 #v7.0.2
         with:
           switches: -avzr --delete
           path: _site/
diff --git a/.github/workflows/stage-deploy.yml b/.github/workflows/stage-deploy.yml
index b375cb0..b829476 100644
--- a/.github/workflows/stage-deploy.yml
+++ b/.github/workflows/stage-deploy.yml
@@ -13,7 +13,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Set up Ruby environment
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@2654679fe7f7c29875c669398a8ec0791b8a64a1 # v1.215.0
         with:
           ruby-version: '3.2'
           bundler-cache: true # Enables caching for Bundler