diff --git a/.github/workflows/cibuild.yaml b/.github/workflows/cibuild.yaml
index 118e7ca..766a71b 100644
--- a/.github/workflows/cibuild.yaml
+++ b/.github/workflows/cibuild.yaml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
-      - uses: ruby/setup-ruby@472790540115ce5bd69d399a020189a8c87d641f # v1.247.0
+      - uses: ruby/setup-ruby@829114fc20da43a41d27359103ec7a63020954d4 # v1.255.0
         with:
           ruby-version: ${{ matrix.ruby }}
       - name: script/cibuild
diff --git a/.github/workflows/pages-gem.yml b/.github/workflows/pages-gem.yml
index 1a4ec67..38fc187 100644
--- a/.github/workflows/pages-gem.yml
+++ b/.github/workflows/pages-gem.yml
@@ -14,7 +14,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Setup Ruby
-        uses: ruby/setup-ruby@472790540115ce5bd69d399a020189a8c87d641f # v1.247.0
+        uses: ruby/setup-ruby@829114fc20da43a41d27359103ec7a63020954d4 # v1.255.0
         with:
           ruby-version: "3.3"
       - name: Build gem