diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5bf78a56..32ef50ae 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,6 +2,9 @@ name: Continuous Integration
 
 on: pull_request
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -11,10 +14,12 @@ jobs:
         python: ['3.9', '3.10', '3.11', '3.12', '3.13', 'pypy3.9']
 
     steps:
-    - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # 4.3.1
+    - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+      with:
+        persist-credentials: false
 
     - name: Set up Python 3.13 for emulator
-      uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # 5.6.0
+      uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6.3.0
       with:
         python-version: '3.13'
     - name: Setup functions emulator environment
@@ -24,7 +29,7 @@ jobs:
         pip install -r integration/emulators/functions/requirements.txt
         deactivate
     - name: Set up Python ${{ matrix.python }}
-      uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # 5.6.0
+      uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6.3.0
       with:
         python-version: ${{ matrix.python }}
     - name: Install dependencies
@@ -34,11 +39,11 @@ jobs:
     - name: Test with pytest
       run: pytest
     - name: Set up Node.js 20
-      uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # 4.4.0
+      uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
       with:
         node-version: 20
     - name: Set up Java 21
-      uses: actions/setup-java@f2beeb24e141e01a676f977032f5a29d81c9e27e # 5.1.0
+      uses: actions/setup-java@0f481fcb613427c0f801b606911222b5b6f3083a # v5.5.0
       with:
         distribution: 'temurin'
         java-version: '21'
@@ -52,9 +57,11 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # 4.3.1
+    - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+      with:
+        persist-credentials: false
     - name: Set up Python 3.9
-      uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # 5.6.0
+      uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6.3.0
       with:
         python-version: 3.9
     - name: Install dependencies
diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index d60b3cd0..57240b23 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -22,6 +22,9 @@ on:
   repository_dispatch:
     types: [firebase_nightly_build]
 
+permissions:
+  contents: read
+
 jobs:
   nightly:
 
@@ -29,12 +32,13 @@ jobs:
 
     steps:
     - name: Checkout source for staging
-      uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # 4.3.1
+      uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       with:
         ref: ${{ github.event.client_payload.ref || github.ref }}
+        persist-credentials: false
 
     - name: Set up Python
-      uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # 5.6.0
+      uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6.3.0
       with:
         python-version: 3.9
 
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 6bbf19aa..510a1352 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -32,6 +32,9 @@ on:
     types:
       - firebase_build
 
+permissions:
+  contents: read
+
 jobs:
   stage_release:
     # To publish a release, merge a PR with the title prefix '[chore] Release ' to main
@@ -46,10 +49,12 @@ jobs:
 
     steps:
     - name: Checkout source for staging
-      uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # 4.3.1
+      uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+      with:
+        persist-credentials: false
 
     - name: Set up Python
-      uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # 5.6.0
+      uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6.3.0
       with:
         python-version: 3.9
 
@@ -105,7 +110,10 @@ jobs:
 
     steps:
     - name: Checkout source for publish
-      uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # 4.3.1
+      uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+      with:
+        # Ignored since the GITHUB_TOKEN needs to be persisted for this workflow.
+        persist-credentials: true # zizmor: ignore[artipacked]
 
     # Download the artifacts created by the stage_release job.
     - name: Download release candidates