diff --git a/.github/workflows/ghcr.yaml b/.github/workflows/ghcr.yaml
index b91ab5c..4509dcb 100644
--- a/.github/workflows/ghcr.yaml
+++ b/.github/workflows/ghcr.yaml
@@ -7,4 +7,4 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Build, Tag and Push Docker Image to GHCR
-        uses: GlueOps/github-actions-build-push-containers@v0.1.3
+        uses: GlueOps/github-actions-build-push-containers@4ae580f710f614ccba941103be98dc97db6599b3 # v0.1.3
diff --git a/Dockerfile b/Dockerfile
index f9d3b32..9f32de5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Use the Nginx image from Docker Hub
-FROM nginx:alpine
+FROM nginx:alpine@sha256:31bad00311cb5eeb8a6648beadcf67277a175da89989f14727420a80e2e76742
 
 # Copy the HTML file to the Nginx document root
 COPY index.html /usr/share/nginx/html