diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 7587565..3b85d0b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -8,6 +8,9 @@ on:
     branches:
       - "2.0.x"
 
+permissions:
+  contents: read
+
 jobs:
   lint:
     name: "Lint"
@@ -25,11 +28,16 @@ jobs:
           - "8.5"
 
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        with:
+          egress-policy: audit
+
       - name: "Checkout"
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: "Install PHP"
-        uses: "shivammathur/setup-php@v2"
+        uses: "shivammathur/setup-php@44454db4f0199b8b9685a5d763dc37cbf79108e1" # v2
         with:
           coverage: "none"
           php-version: "${{ matrix.php-version }}"
@@ -49,18 +57,23 @@ jobs:
     runs-on: "ubuntu-latest"
 
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        with:
+          egress-policy: audit
+
       - name: "Checkout"
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: "Checkout build-cs"
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           repository: "phpstan/build-cs"
           path: "build-cs"
           ref: "2.x"
 
       - name: "Install PHP"
-        uses: "shivammathur/setup-php@v2"
+        uses: "shivammathur/setup-php@44454db4f0199b8b9685a5d763dc37cbf79108e1" # v2
         with:
           coverage: "none"
           php-version: "8.2"
@@ -101,11 +114,16 @@ jobs:
           - "highest"
 
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        with:
+          egress-policy: audit
+
       - name: "Checkout"
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: "Install PHP"
-        uses: "shivammathur/setup-php@v2"
+        uses: "shivammathur/setup-php@44454db4f0199b8b9685a5d763dc37cbf79108e1" # v2
         with:
           coverage: "none"
           php-version: "${{ matrix.php-version }}"
@@ -141,11 +159,16 @@ jobs:
           - "highest"
 
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        with:
+          egress-policy: audit
+
       - name: "Checkout"
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: "Install PHP"
-        uses: "shivammathur/setup-php@v2"
+        uses: "shivammathur/setup-php@44454db4f0199b8b9685a5d763dc37cbf79108e1" # v2
         with:
           coverage: "none"
           php-version: "${{ matrix.php-version }}"
diff --git a/.github/workflows/claude-react-on-comment.yml b/.github/workflows/claude-react-on-comment.yml
index 982a027..8d00d6c 100644
--- a/.github/workflows/claude-react-on-comment.yml
+++ b/.github/workflows/claude-react-on-comment.yml
@@ -28,6 +28,11 @@ jobs:
     outputs:
       triggered: ${{ steps.check.outputs.triggered }}
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        with:
+          egress-policy: audit
+
       - name: "Check for trigger phrase"
         id: check
         env:
@@ -47,11 +52,16 @@ jobs:
     timeout-minutes: 60
 
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        with:
+          egress-policy: audit
+
       - name: "Checkout"
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
       - name: "React to feedback"
-        uses: anthropics/claude-code-action@v1
+        uses: anthropics/claude-code-action@35a9e0292d36f1186f5d842b14eb575074e8b450 # v1.0.57
         with:
           claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
           trigger_phrase: "@phpstan-bot"
diff --git a/.github/workflows/create-tag.yml b/.github/workflows/create-tag.yml
index 206477e..07b7281 100644
--- a/.github/workflows/create-tag.yml
+++ b/.github/workflows/create-tag.yml
@@ -20,33 +20,38 @@ jobs:
     name: "Create tag"
     runs-on: "ubuntu-latest"
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        with:
+          egress-policy: audit
+
       - name: "Checkout"
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0
           token: ${{ secrets.PHPSTAN_BOT_TOKEN }}
 
       - name: 'Get Previous tag'
         id: previoustag
-        uses: "WyriHaximus/github-action-get-previous-tag@v2"
+        uses: "WyriHaximus/github-action-get-previous-tag@61819f33034117e6c686e6a31dba995a85afc9de" # v2.0.0
         env:
           GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
 
       - name: 'Get next versions'
         id: semvers
-        uses: "WyriHaximus/github-action-next-semvers@v1"
+        uses: "WyriHaximus/github-action-next-semvers@d079934efaf011a4cf8912d4637097fe35d32b93" # v1
         with:
           version: ${{ steps.previoustag.outputs.tag }}
 
       - name: "Create new minor tag"
-        uses: rickstaa/action-create-tag@v1
+        uses: rickstaa/action-create-tag@a1c7777fcb2fee4f19b0f283ba888afa11678b72 # v1.7.2
         if: inputs.version == 'minor'
         with:
           tag: ${{ steps.semvers.outputs.minor }}
           message: ${{ steps.semvers.outputs.minor }}
 
       - name: "Create new patch tag"
-        uses: rickstaa/action-create-tag@v1
+        uses: rickstaa/action-create-tag@a1c7777fcb2fee4f19b0f283ba888afa11678b72 # v1.7.2
         if: inputs.version == 'patch'
         with:
           tag: ${{ steps.semvers.outputs.patch }}
diff --git a/.github/workflows/lock-closed-issues.yml b/.github/workflows/lock-closed-issues.yml
index fa8543e..22a094a 100644
--- a/.github/workflows/lock-closed-issues.yml
+++ b/.github/workflows/lock-closed-issues.yml
@@ -4,11 +4,21 @@ on:
   schedule:
     - cron: '14 0 * * *'
 
+permissions:
+  contents: read
+
 jobs:
   lock:
+    permissions:
+      issues: write  # for dessant/lock-threads to lock issues
     runs-on: ubuntu-latest
     steps:
-      - uses: dessant/lock-threads@v6
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        with:
+          egress-policy: audit
+
+      - uses: dessant/lock-threads@7266a7ce5c1df01b1c6db85bf8cd86c737dadbe7 # v6.0.0
         with:
           github-token: ${{ github.token }}
           issue-inactive-days: '31'
diff --git a/.github/workflows/release-toot.yml b/.github/workflows/release-toot.yml
index 1ba4fd7..21f0951 100644
--- a/.github/workflows/release-toot.yml
+++ b/.github/workflows/release-toot.yml
@@ -10,7 +10,12 @@ jobs:
   toot:
     runs-on: ubuntu-latest
     steps:
-      - uses: cbrgm/mastodon-github-action@v2
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        with:
+          egress-policy: audit
+
+      - uses: cbrgm/mastodon-github-action@845250b56b82d94e26bf23984d5e0cf5ced6d18f # v2.1.25
         if: ${{ !github.event.repository.private }}
         with:
           # GitHub event payload
diff --git a/.github/workflows/release-tweet.yml b/.github/workflows/release-tweet.yml
index d81f34c..18545f0 100644
--- a/.github/workflows/release-tweet.yml
+++ b/.github/workflows/release-tweet.yml
@@ -10,7 +10,12 @@ jobs:
   tweet:
     runs-on: ubuntu-latest
     steps:
-      - uses: Eomm/why-don-t-you-tweet@v2
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        with:
+          egress-policy: audit
+
+      - uses: Eomm/why-don-t-you-tweet@d9ec12835f4d494dda920f95f885df3dba380493 # v2.0.0
         if: ${{ !github.event.repository.private }}
         with:
           # GitHub event payload
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index efb9bbe..be3c273 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -13,18 +13,23 @@ jobs:
     runs-on: "ubuntu-latest"
 
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@5ef0c079ce82195b2a36a210272d6b661572d83e # v2.14.2
+        with:
+          egress-policy: audit
+
       - name: "Checkout"
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Generate changelog
         id: changelog
-        uses: metcalfc/changelog-generator@v4.6.2
+        uses: metcalfc/changelog-generator@3f82cef08fe5dcf57c591fe165e70e1d5032e15a # v4.6.2
         with:
           myToken: ${{ secrets.PHPSTAN_BOT_TOKEN }}
 
       - name: "Create release"
         id: create-release
-        uses: actions/create-release@v1
+        uses: actions/create-release@0cb9c9b65d5d1901c1f53e5e66eaf4afd303e70e # v1.1.4
         env:
           GITHUB_TOKEN: ${{ secrets.PHPSTAN_BOT_TOKEN }}
         with: