diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index c8f767a..85c8714 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -16,7 +16,7 @@ jobs:
         ruby-version: ["3.1", "3.2", "3.3", "3.4"]
     steps:
       - uses: actions/checkout@v6.0.2
-      - uses: ruby/setup-ruby@v1
+      - uses: ruby/setup-ruby@v1.307.0
         with:
           ruby-version: ${{ matrix.ruby-version }}
           bundler-cache: true
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index d07210c..479795a 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -20,7 +20,7 @@ jobs:
         with:
           ref: ${{ github.event.release.tag_name }}
 
-      - uses: ruby/setup-ruby@v1
+      - uses: ruby/setup-ruby@v1.307.0
         with:
           ruby-version: "3.4"
           bundler-cache: true