diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 09f461b..b731c62 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -5,13 +5,21 @@ on:
     branches: [ master ]
   workflow_dispatch:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions: {}  # Deny all permissions by default at workflow level
+
 jobs:
   test-build:
     runs-on: ubuntu-latest
 
     steps:
       # 1 – Check out the code
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
 
       # 2 – Expose the version tag as $PACKAGE_VERSION (only if this is a v* tag ref)
       - name: Set environment package version from tag
@@ -25,20 +33,20 @@ jobs:
           fi
 
       # 3 – Set up Python
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: '3.13'
           cache: 'pip'
 
       # 4 – Set up Node.js
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: '24.x'
           cache: 'npm'
 
       # 5 – Set up JDK 17 and enable sbt cache
       - name: Set up JDK 17
-        uses: actions/setup-java@v5
+        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
         with:
           distribution: 'temurin'
           java-version: '17'
@@ -46,7 +54,7 @@ jobs:
 
       # 6 – Install sbt 1.12.4
       - name: Set up sbt
-        uses: sbt/setup-sbt@v1
+        uses: sbt/setup-sbt@508b753e53cb6095967669e0911487d2b9bc9f41 # v1.1.22
         with:
           sbt-runner-version: '1.12.4'
 
diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index b0a9653..e73fa11 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -11,21 +11,29 @@ on:
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions: {}  # Deny all permissions by default at workflow level
+
 jobs:
   check-code:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
       
       - name: Setup Node.js environment
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: 24.x
           cache: yarn
           cache-dependency-path: yarn.lock
           
       - name: Setup Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: '3.13'
       
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 132a6b3..5ba42a2 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -5,6 +5,12 @@ on:
     tags:
       - 'v*'  # runs only when you push tags like v1.2.3
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions: {}  # Deny all permissions by default at workflow level
+
 jobs:
   build-publish:
     runs-on: ubuntu-latest
@@ -14,7 +20,9 @@ jobs:
 
     steps:
       # 1 – Check out the repo
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
 
       # 2 – Expose the tag (e.g. 1.2.3) as $PACKAGE_VERSION
       - name: Set environment package version from tag
@@ -24,28 +32,26 @@ jobs:
           echo "PACKAGE_VERSION=${ref#v}" >> "$GITHUB_ENV"
 
       # 3 – Set up Python
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: '3.13'
-          cache: 'pip'
 
       # 4 – Set up Node.js
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: '24.x'
-          cache: 'npm'
+          package-manager-cache: false
 
       # 5 – Set up JDK 17 and enable sbt cache
       - name: Set up JDK 17
-        uses: actions/setup-java@v5
+        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
         with:
           distribution: 'temurin'
           java-version: '17'
-          cache: 'sbt'
 
       # 6 – Install sbt 1.12.4
       - name: Set up sbt
-        uses: sbt/setup-sbt@v1
+        uses: sbt/setup-sbt@508b753e53cb6095967669e0911487d2b9bc9f41 # v1.1.22
         with:
           sbt-runner-version: '1.12.4'
 
@@ -59,4 +65,4 @@ jobs:
 
       # 9 – Publish to PyPI (Trusted Publishing)
       - name: Publish distribution to PyPI 🚀
-        uses: pypa/gh-action-pypi-publish@release/v1
+        uses: pypa/gh-action-pypi-publish@cef221092ed1bacb1cc03d23a2d87d1d172e277b # v1.14.0
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 118856a..6b43d4f 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -8,25 +8,36 @@ on:
         required: true
         default: "patch"
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions: {}  # Deny all permissions by default at workflow level
+
 jobs:
   bump-version:
     runs-on: ubuntu-latest
+    environment: tag-release
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: '3.13'
       - name: Install release tooling
         run: python -m pip install bump2version
       - name: Bump and tag
+        env:
+          BUMP: ${{ github.event.inputs.bump }}
         run: |
           git config --local user.email "swan-admins@cern.ch"
           git config --local user.name "swan-admins[bot]"
-          bump2version ${{ github.event.inputs.bump }}
+          bump2version ${BUMP}
       - name: Push changes
-        uses: ad-m/github-push-action@master
-        with:
-          github_token: ${{ secrets.WORKFLOW_ACCESS_TOKEN }}
-          tags: true
+        env:
+          WORKFLOW_ACCESS_TOKEN: ${{ secrets.WORKFLOW_ACCESS_TOKEN }}
+          REF_NAME: ${{ github.ref_name }}
+        run: |
+          git remote set-url origin "https://x-access-token:${WORKFLOW_ACCESS_TOKEN}@github.com/${GITHUB_REPOSITORY}.git"
+          git push origin "${REF_NAME}" --tags --atomic