diff --git a/.github/workflows/docs-website-test-docs-snippets.yml b/.github/workflows/docs-website-test-docs-snippets.yml
index 99aad642f7..78a0dca953 100644
--- a/.github/workflows/docs-website-test-docs-snippets.yml
+++ b/.github/workflows/docs-website-test-docs-snippets.yml
@@ -2,13 +2,13 @@ name: Test Python snippets in docs
 
 on:
   schedule:
-    - cron: '17 3 * * *'  # daily at 03:17 UTC
+    - cron: "17 3 * * *" # daily at 03:17 UTC
   workflow_dispatch:
     inputs:
       haystack_version:
-        description: 'Haystack version to test against (e.g., 2.16.1, main)'
+        description: "Haystack version to test against (e.g., 2.16.1, main)"
         required: false
-        default: 'main'
+        default: "main"
         type: string
 
 env:
@@ -35,7 +35,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
-          python-version: '3.11'
+          python-version: "3.11"
 
       - name: Install Hatch
         run: |
@@ -61,6 +61,6 @@ jobs:
       - test-docs-snippets
     runs-on: ubuntu-slim
     steps:
-      - uses: deepset-ai/notify-slack-action@3cda73b77a148f16f703274198e7771340cf862b # v1
+      - uses: deepset-ai/notify-slack-action@a65def0c8bf91d6520286ab34280151c76a5a008 # v1.1.0
         with:
           slack-webhook-url: ${{ secrets.SLACK_WEBHOOK_URL_NOTIFICATIONS }}
diff --git a/.github/workflows/docs_search_sync.yml b/.github/workflows/docs_search_sync.yml
index 0cb6383b61..21a800c8a1 100644
--- a/.github/workflows/docs_search_sync.yml
+++ b/.github/workflows/docs_search_sync.yml
@@ -15,7 +15,6 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-
       - name: Checkout Haystack repo
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
@@ -50,6 +49,6 @@ jobs:
 
       - name: Notify Slack on nightly failure
         if: failure() && github.event_name == 'schedule'
-        uses: deepset-ai/notify-slack-action@3cda73b77a148f16f703274198e7771340cf862b # v1
+        uses: deepset-ai/notify-slack-action@a65def0c8bf91d6520286ab34280151c76a5a008 # v1.1.0
         with:
           slack-webhook-url: ${{ secrets.SLACK_WEBHOOK_URL_NOTIFICATIONS }}
diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
index 69632cd7ba..bf81f36552 100644
--- a/.github/workflows/e2e.yml
+++ b/.github/workflows/e2e.yml
@@ -27,22 +27,22 @@ jobs:
     timeout-minutes: 60
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
-    - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
-      with:
-        python-version: "${{ env.PYTHON_VERSION }}"
+      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
+        with:
+          python-version: "${{ env.PYTHON_VERSION }}"
 
-    - name: Install Hatch
-      run: |
-        python -m pip install --upgrade pip
-        pip install hatch==${{ env.HATCH_VERSION }} --uploaded-prior-to=P1D
+      - name: Install Hatch
+        run: |
+          python -m pip install --upgrade pip
+          pip install hatch==${{ env.HATCH_VERSION }} --uploaded-prior-to=P1D
 
-    - name: Run tests
-      run: hatch run e2e:test
+      - name: Run tests
+        run: hatch run e2e:test
 
-    - name: Notify Slack on nightly failure
-      if: failure() && github.event_name == 'schedule'
-      uses: deepset-ai/notify-slack-action@3cda73b77a148f16f703274198e7771340cf862b # v1
-      with:
-        slack-webhook-url: ${{ secrets.SLACK_WEBHOOK_URL_NOTIFICATIONS }}
+      - name: Notify Slack on nightly failure
+        if: failure() && github.event_name == 'schedule'
+        uses: deepset-ai/notify-slack-action@a65def0c8bf91d6520286ab34280151c76a5a008 # v1.1.0
+        with:
+          slack-webhook-url: ${{ secrets.SLACK_WEBHOOK_URL_NOTIFICATIONS }}
diff --git a/.github/workflows/license_compliance.yml b/.github/workflows/license_compliance.yml
index f8c4950764..9c29389476 100644
--- a/.github/workflows/license_compliance.yml
+++ b/.github/workflows/license_compliance.yml
@@ -59,6 +59,6 @@ jobs:
 
       - name: Notify Slack on failure
         if: failure()
-        uses: deepset-ai/notify-slack-action@3cda73b77a148f16f703274198e7771340cf862b # v1
+        uses: deepset-ai/notify-slack-action@a65def0c8bf91d6520286ab34280151c76a5a008 # v1.1.0
         with:
           slack-webhook-url: ${{ secrets.SLACK_WEBHOOK_URL_NOTIFICATIONS }}
diff --git a/.github/workflows/slow.yml b/.github/workflows/slow.yml
index 396fd3f114..42e5ea9742 100644
--- a/.github/workflows/slow.yml
+++ b/.github/workflows/slow.yml
@@ -158,7 +158,7 @@ jobs:
 
       - name: Notify Slack on nightly failure
         if: failure() && github.event_name == 'schedule'
-        uses: deepset-ai/notify-slack-action@3cda73b77a148f16f703274198e7771340cf862b # v1
+        uses: deepset-ai/notify-slack-action@a65def0c8bf91d6520286ab34280151c76a5a008 # v1.1.0
         with:
           slack-webhook-url: ${{ secrets.SLACK_WEBHOOK_URL_NOTIFICATIONS }}
 
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 56b85e04c3..8e6f6b8203 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -17,8 +17,8 @@ on:
       - "v[0-9].*[0-9].x"
     # when we push, we do not need to satisfy Branch Protection rules, so we can ignore PRs that just change docs
     paths-ignore:
-      - 'docs/**'
-      - 'docs-website/**'
+      - "docs/**"
+      - "docs-website/**"
   pull_request:
     types:
       - opened
@@ -37,9 +37,9 @@ env:
 
 jobs:
   check-if-changed:
-  # This job checks if the relevant files have been changed.
-  # We check for changes in the check-if-changed job instead of using paths/paths-ignore at workflow level.
-  # This ensures the "Mark tests as completed" job always runs, which is required by Branch Protection rules.
+    # This job checks if the relevant files have been changed.
+    # We check for changes in the check-if-changed job instead of using paths/paths-ignore at workflow level.
+    # This ensures the "Mark tests as completed" job always runs, which is required by Branch Protection rules.
     name: Check if changed
     runs-on: ubuntu-slim
     permissions:
@@ -224,7 +224,6 @@ jobs:
           pip install hatch==${{ env.HATCH_VERSION }} --uploaded-prior-to=P1D
           echo "env=$(hatch env find test)" >> "$GITHUB_OUTPUT"
 
-
       - name: Run
         run: hatch run test:integration-only-fast
 
@@ -257,7 +256,6 @@ jobs:
           path: ${{ steps.hatch.outputs.env }}
           key: ${{ runner.os }}-${{ github.sha }}
 
-
       - name: Run
         run: hatch run test:integration-only-fast
 
@@ -297,7 +295,7 @@ jobs:
       - integration-tests-windows
     runs-on: ubuntu-slim
     steps:
-      - uses: deepset-ai/notify-slack-action@3cda73b77a148f16f703274198e7771340cf862b # v1
+      - uses: deepset-ai/notify-slack-action@a65def0c8bf91d6520286ab34280151c76a5a008 # v1.1.0
         with:
           slack-webhook-url: ${{ secrets.SLACK_WEBHOOK_URL_NOTIFICATIONS }}
 
@@ -314,15 +312,15 @@ jobs:
       - integration-tests-windows
 
     steps:
-    - name: Mark tests as completed
-      run: |
-        if [ "${{ needs.check-imports.result }}" = "failure" ] ||
-           [ "${{ needs.mypy.result }}" = "failure" ] ||
-           [ "${{ needs.integration-tests-linux.result }}" = "failure" ] ||
-           [ "${{ needs.integration-tests-macos.result }}" = "failure" ] ||
-           [ "${{ needs.integration-tests-windows.result }}" = "failure" ]; then
-          echo "Tests failed!"
-          exit 1
-        else
-          echo "Tests completed!"
-        fi
+      - name: Mark tests as completed
+        run: |
+          if [ "${{ needs.check-imports.result }}" = "failure" ] ||
+             [ "${{ needs.mypy.result }}" = "failure" ] ||
+             [ "${{ needs.integration-tests-linux.result }}" = "failure" ] ||
+             [ "${{ needs.integration-tests-macos.result }}" = "failure" ] ||
+             [ "${{ needs.integration-tests-windows.result }}" = "failure" ]; then
+            echo "Tests failed!"
+            exit 1
+          else
+            echo "Tests completed!"
+          fi