diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 66ccb57..1c894e1 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -17,7 +17,7 @@ jobs:
       - uses: actions/checkout@v7
         with:
           ref: ${{ github.ref }}
-      - uses: ruby/setup-ruby@v1
+      - uses: ruby/setup-ruby@v1.319.0
         with:
           ruby-version: '3.4'
           bundler-cache: true
diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index fda3209..2f64b39 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -16,7 +16,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v7
-      - uses: ruby/setup-ruby@v1
+      - uses: ruby/setup-ruby@v1.319.0
         with:
           ruby-version: ${{ matrix.ruby-version }}
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically