diff --git a/.github/workflows/changie.yaml b/.github/workflows/changie.yaml
index 7ab6bea..7aa517e 100644
--- a/.github/workflows/changie.yaml
+++ b/.github/workflows/changie.yaml
@@ -15,11 +15,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
       with:
         fetch-depth: 0
 
     - name: Prepare release
-      uses: labd/changie-release-action@v0.2.0
+      uses: labd/changie-release-action@767b033c5eeef3070b58796aab052c3077873371 # v0.2.0
       with:
         github-token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/pinact.yaml b/.github/workflows/pinact.yaml
new file mode 100644
index 0000000..01f5744
--- /dev/null
+++ b/.github/workflows/pinact.yaml
@@ -0,0 +1,30 @@
+name: Pinact
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["**"]
+    paths:
+      - ".github/workflows/**"
+      - ".github/actions/**"
+
+permissions: {}
+
+jobs:
+  pinact:
+    # Only run on pull requests from the same repository
+    if: github.event.pull_request.head.repo.full_name == github.repository
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Pin actions
+        uses: suzuki-shunsuke/pinact-action@cf51507d80d4d6522a07348e3d58790290eaf0b6 # v2.0.0
+        with:
+          skip_push: true
+          verify: true
+          min_age: 7
diff --git a/.github/workflows/zizmor.yaml b/.github/workflows/zizmor.yaml
new file mode 100644
index 0000000..8e6493b
--- /dev/null
+++ b/.github/workflows/zizmor.yaml
@@ -0,0 +1,32 @@
+name: Zizmor
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["**"]
+    paths:
+      - ".github/workflows/**"
+      - ".github/actions/**"
+
+permissions: {}
+
+jobs:
+  zizmor:
+    name: Run zizmor
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      actions: read
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - name: Run zizmor
+        uses: zizmorcore/zizmor-action@71321a20a9ded102f6e9ce5718a2fcec2c4f70d8 # v0.5.2
+        with:
+          advanced-security: false
+          annotations: true
+          min-severity: high