diff --git a/.github/workflows/trivy.yml b/.github/workflows/trivy.yml
index 76ff2fb..7b8b8be 100644
--- a/.github/workflows/trivy.yml
+++ b/.github/workflows/trivy.yml
@@ -17,7 +17,7 @@ jobs:
           docker build -t docker.io/my-organization/my-app:${{ github.sha }} .
 
       - name: Run Trivy vulnerability scanner
-        uses: aquasecurity/trivy-action@0.28.0
+        uses: aquasecurity/trivy-action@915b19bbe73b92a6cf82a1bc12b087c9a19a5fe2 # 0.28.0
         with:
           image-ref: 'docker.io/my-organization/my-app:${{ github.sha }}'
           format: 'sarif'