diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index df6879a..518becd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,10 +20,10 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
       - name: Setup Ruby
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@ba696adf55506673e48342a66e30f1f53cadeae0 # v1
         with:
           ruby-version: ${{ matrix.rubyVersion }}