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/release.yml b/.github/workflows/release.yml
index 48b0db1..e6ad5c3 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -22,10 +22,10 @@ jobs:
       CI: true
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
       - name: Set up Node.js
-        uses: labd/gh-actions-typescript/pnpm-install@main
+        uses: labd/gh-actions-typescript/pnpm-install@e7a21fb56b52bf2d91616e34f0bc3f4f9a821b62 # main
         with:
           node-version: ${{ matrix.node }}
 
@@ -45,16 +45,16 @@ jobs:
     needs: validate
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
       - name: Set up Node.js
-        uses: labd/gh-actions-typescript/pnpm-install@main
+        uses: labd/gh-actions-typescript/pnpm-install@e7a21fb56b52bf2d91616e34f0bc3f4f9a821b62 # main
 
       - name: Run build
         run: pnpm build
 
       - name: Create and publish versions
-        uses: changesets/action@v1
+        uses: changesets/action@6a0a831ff30acef54f2c6aa1cbbc1096b066edaf # v1.7.0
         with:
           title: "Release new version"
           commit: "update version"
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