diff --git a/Dockerfile b/Dockerfile
index d5031fdf..b8ac0df5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -36,7 +36,7 @@ COPY --from=builder /go/bin/gardener-extension-shoot-rsyslog-relp-admission /gar
 ENTRYPOINT ["/gardener-extension-shoot-rsyslog-relp-admission"]
 
 ############# rsyslog-relp-echo-server
-FROM alpine:3.20.3 AS shoot-rsyslog-relp-echo-server
+FROM alpine:3.21.0 AS shoot-rsyslog-relp-echo-server
 RUN apk update && apk add rsyslog-relp
 ARG EFFECTIVE_VERSION
 RUN echo "$EFFECTIVE_VERSION" > /etc/VERSION
diff --git a/imagevector/images.yaml b/imagevector/images.yaml
index d459db30..8efb5931 100644
--- a/imagevector/images.yaml
+++ b/imagevector/images.yaml
@@ -6,7 +6,7 @@
 images:
 - name: alpine
   repository: europe-docker.pkg.dev/gardener-project/releases/3rd/alpine
-  tag: "3.20.3"
+  tag: "3.21.0"
   labels:
   - name: cloud.gardener.cnudie/dso/scanning-hints/binary_id/v1
     value:
diff --git a/test/integration/controller/lifecycle/lifecycle_test.go b/test/integration/controller/lifecycle/lifecycle_test.go
index 52ec61d1..ddd3061a 100644
--- a/test/integration/controller/lifecycle/lifecycle_test.go
+++ b/test/integration/controller/lifecycle/lifecycle_test.go
@@ -113,7 +113,7 @@ if [[ -d /host/var/lib/rsyslog-relp-configurator ]]; then
   rm -rf /host/var/lib/rsyslog-relp-configurator
 fi`,
 								},
-								Image:           "europe-docker.pkg.dev/gardener-project/releases/3rd/alpine:3.20.3",
+								Image:           "europe-docker.pkg.dev/gardener-project/releases/3rd/alpine:3.21.0",
 								ImagePullPolicy: corev1.PullIfNotPresent,
 								Name:            "rsyslog-relp-configuration-cleaner",
 								Resources: corev1.ResourceRequirements{