diff --git a/.github/workflows/scheduled.yml b/.github/workflows/scheduled.yml
index 62a5787a825..5e7988fbeb2 100644
--- a/.github/workflows/scheduled.yml
+++ b/.github/workflows/scheduled.yml
@@ -104,7 +104,7 @@ jobs:
           test-bot: false
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@5f19ec79cedfadb78ab837f95b87734d0003c899 # v1.173.0
         with:
           bundler-cache: true
 
@@ -143,7 +143,7 @@ jobs:
           test-bot: false
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@5f19ec79cedfadb78ab837f95b87734d0003c899 # v1.173.0
         with:
           bundler-cache: true
 
@@ -173,7 +173,7 @@ jobs:
           test-bot: false
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@5f19ec79cedfadb78ab837f95b87734d0003c899 # v1.173.0
         with:
           bundler-cache: true
 
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 647d4314d2e..a2882042894 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -25,7 +25,7 @@ jobs:
           test-bot: false
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@v1
+        uses: ruby/setup-ruby@5f19ec79cedfadb78ab837f95b87734d0003c899 # v1.173.0
         with:
           bundler-cache: true