diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 839c8a6..177c25f 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -10,6 +10,8 @@ jobs:
   rubocop:
 
     runs-on: ubuntu-latest
+    permissions:
+      id-token: write
 
     steps:
       - uses: actions/checkout@v3
@@ -17,6 +19,9 @@ jobs:
         uses: ruby/setup-ruby@v1
         with:
           ruby-version: '3.4'
+      - uses: flatt-security/setup-takumi-guard-rubygems@v1
+        with:
+          bot-id: "${{ vars.TAKUMI_GUARD_BOT_ID }}"
       - name: Install dependencies
         run: bundle install
       - name: Run RuboCop
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 7440121..1e659e8 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,6 +10,8 @@ jobs:
   test:
 
     runs-on: ubuntu-latest
+    permissions:
+      id-token: write
 
     strategy:
       matrix:
@@ -22,6 +24,9 @@ jobs:
         uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby-version }}
+      - uses: flatt-security/setup-takumi-guard-rubygems@v1
+        with:
+          bot-id: "${{ vars.TAKUMI_GUARD_BOT_ID }}"
       - name: Set up Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v4
         with: