diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index bfe0113..fe71c2f 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -23,7 +23,7 @@ jobs:
       fail-fast: false
     steps:
     - uses: actions/checkout@v6
-    - uses: ruby/setup-ruby@v1
+    - uses: ruby/setup-ruby@v1.301.0
       with:
         ruby-version: "${{ matrix.ruby }}"
         bundler-cache: true
diff --git a/.github/workflows/rubocop.yml b/.github/workflows/rubocop.yml
index ac1fab6..83e035c 100644
--- a/.github/workflows/rubocop.yml
+++ b/.github/workflows/rubocop.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v6
-    - uses: ruby/setup-ruby@v1
+    - uses: ruby/setup-ruby@v1.301.0
       with:
         ruby-version: '4'
         bundler-cache: true