diff --git a/.github/workflows/deploy.yaml b/.github/workflows/deploy.yaml
index abc13f1..9349dd5 100644
--- a/.github/workflows/deploy.yaml
+++ b/.github/workflows/deploy.yaml
@@ -15,15 +15,15 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
         with:
           fetch-depth: 0
 
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version: 20
 
-      - uses: pnpm/action-setup@v2
+      - uses: pnpm/action-setup@eae0cfeb286e66ffb5155f1a79b90583a127a68b # v2.4.1
         id: pnpm-install
         with:
           version: 8
@@ -41,15 +41,15 @@ jobs:
     name: Deploy CT category field plugin
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
         with:
           fetch-depth: 0
 
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version: 20
 
-      - uses: pnpm/action-setup@v2
+      - uses: pnpm/action-setup@eae0cfeb286e66ffb5155f1a79b90583a127a68b # v2.4.1
         id: pnpm-install
         with:
           version: 8
@@ -60,7 +60,7 @@ jobs:
         shell: bash
         run: echo "STORE_PATH=$(pnpm store path)" >> $GITHUB_OUTPUT
 
-      - uses: actions/cache@v3
+      - uses: actions/cache@6f8efc29b200d32929f49075959781ed54ec270c # v3.5.0
         name: Setup pnpm cache
         with:
           path: ${{ steps.pnpm-cache.outputs.STORE_PATH }}
diff --git a/.github/workflows/pinact.yaml b/.github/workflows/pinact.yaml
new file mode 100644
index 0000000..2ae23a3
--- /dev/null
+++ b/.github/workflows/pinact.yaml
@@ -0,0 +1,32 @@
+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
+    permissions:
+      contents: read
+    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