diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8e7dcd9..e78dbb8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,6 +16,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        with:
+          persist-credentials: false
       - uses: gradle/actions/wrapper-validation@9c971963bec38e04b3d30dcc455b5382be2fdbfb # v6
       - uses: actions/setup-java@b6effb05e454b25005698d916606bdc6ffcbf961 # v5
         with:
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 4f18b6b..3121502 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -27,6 +27,8 @@ jobs:
             build_mode: manual
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        with:
+          persist-credentials: false
       - uses: actions/setup-java@b6effb05e454b25005698d916606bdc6ffcbf961 # v5
         if: matrix.language == 'java-kotlin'
         with:
diff --git a/.github/workflows/dependency-review.yml b/.github/workflows/dependency-review.yml
new file mode 100644
index 0000000..83ac0c5
--- /dev/null
+++ b/.github/workflows/dependency-review.yml
@@ -0,0 +1,34 @@
+# SPDX-FileCopyrightText: 2026 Progmasoft <support@progmasoft.com>
+# SPDX-License-Identifier: MPL-2.0 WITH AdditionRef-Progmasoft-Exception-1.1
+
+name: Dependency Review
+
+# Looks at the dependencies a pull request adds or changes, and fails when
+# one of them has a known vulnerability of high severity or worse.
+# Dependabot watches what is already there; this holds what comes in.
+
+on:
+  pull_request:
+
+permissions: {}
+
+concurrency:
+  group: dependency-review-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  review:
+    name: Dependency review
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        with:
+          persist-credentials: false
+
+      - name: Review the dependency changes
+        uses: actions/dependency-review-action@a1d282b36b6f3519aa1f3fc636f609c47dddb294 # v5.0.0
+        with:
+          fail-on-severity: high
diff --git a/.github/workflows/zizmor.yml b/.github/workflows/zizmor.yml
new file mode 100644
index 0000000..17ac559
--- /dev/null
+++ b/.github/workflows/zizmor.yml
@@ -0,0 +1,38 @@
+# SPDX-FileCopyrightText: 2026 Progmasoft <support@progmasoft.com>
+# SPDX-License-Identifier: MPL-2.0 WITH AdditionRef-Progmasoft-Exception-1.1
+
+name: Workflow Security
+
+# zizmor reads the workflows of this repository for what makes a workflow
+# unsafe: a token that is wider than its job needs, text from a pull request
+# that reaches a shell, an action that is not pinned. Its findings are
+# uploaded to code scanning.
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+
+permissions: {}
+
+concurrency:
+  group: zizmor-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  zizmor:
+    name: zizmor
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        with:
+          persist-credentials: false
+
+      - name: Audit the workflows
+        uses: zizmorcore/zizmor-action@cc914d7f3750a2d13d75c7f184a1060aa0e9d482 # v0.6.4