diff --git a/.github/workflows/gem_push.yml b/.github/workflows/gem_push.yml
index 2e41c21..1266ebf 100644
--- a/.github/workflows/gem_push.yml
+++ b/.github/workflows/gem_push.yml
@@ -20,7 +20,7 @@ jobs:
       id-token: write
     steps:
       - uses: actions/checkout@v6
-      - uses: ruby/setup-ruby@v1
+      - uses: ruby/setup-ruby@v1.300.0
         with:
           ruby-version: ruby
           bundler-cache: true
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 7b679fe..6ca0b09 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -8,7 +8,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
 
-      - uses: ruby/setup-ruby@v1
+      - uses: ruby/setup-ruby@v1.300.0
         with:
           ruby-version: ruby
           bundler-cache: true
diff --git a/.github/workflows/mutant.yml b/.github/workflows/mutant.yml
index 42e79f4..7314657 100644
--- a/.github/workflows/mutant.yml
+++ b/.github/workflows/mutant.yml
@@ -8,7 +8,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
 
-      - uses: ruby/setup-ruby@v1
+      - uses: ruby/setup-ruby@v1.300.0
         with:
           ruby-version: ruby
           bundler-cache: true
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2c8e3ee..7f14eca 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -28,7 +28,7 @@ jobs:
 
       - run: rm Gemfile.lock
 
-      - uses: ruby/setup-ruby@v1
+      - uses: ruby/setup-ruby@v1.300.0
         with:
           ruby-version: ${{ matrix.ruby-version }}
           bundler-cache: true