diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 312d5cc..f0c1d9c 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -2,7 +2,13 @@ name: release
 
 on:
   push:
-    tags: '*'
+    tags:
+      - '*'
+
+permissions:
+  contents: write # needed to write releases
+  id-token: write # needed for keyless signing
+  packages: write # needed for ghcr access
 
 jobs:
   release:
@@ -18,8 +24,6 @@ jobs:
       - name: Setup Docker Buildx
         id: buildx
         uses: docker/setup-buildx-action@v1
-        with:
-          buildkitd-flags: "--debug"
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v1
         with:
@@ -60,6 +64,13 @@ jobs:
             org.opencontainers.image.revision=${{ github.sha }}
             org.opencontainers.image.version=${{ steps.prep.outputs.VERSION }}
             org.opencontainers.image.created=${{ steps.prep.outputs.BUILD_DATE }}
+      - name: Sign images
+        env:
+          COSIGN_EXPERIMENTAL: 1
+        run: |
+          cosign sign docker.io/stefanprodan/podinfo:${{ steps.prep.outputs.VERSION }}
+          cosign sign docker.io/stefanprodan/podinfo:latest
+          cosign sign ghcr.io/stefanprodan/podinfo:${{ steps.prep.outputs.VERSION }}
       - name: Publish base image
         uses: docker/build-push-action@v2
         with:
diff --git a/README.md b/README.md
index 16b6efb..4b15202 100644
--- a/README.md
+++ b/README.md
@@ -15,9 +15,7 @@ Specifications:
 * Health checks (readiness and liveness)
 * Graceful shutdown on interrupt signals
 * File watcher for secrets and configmaps
-* Instrumented with Prometheus
-* Tracing with Istio and Jaeger
-* Linkerd service profile
+* Instrumented with Prometheus and Open Telemetry
 * Structured logging with zap 
 * 12-factor app with viper
 * Fault injection (random errors and latency)
@@ -26,7 +24,8 @@ Specifications:
 * End-to-End testing with Kubernetes Kind and Helm
 * Kustomize testing with GitHub Actions and Open Policy Agent
 * Multi-arch container image with Docker buildx and Github Actions
-* CVE scanning with trivy
+* Container image signing with Sigstore cosign
+* CVE scanning with Trivy
 
 Web API: