diff --git a/tutorials/base/web/leeroy-app/Dockerfile b/tutorials/base/web/leeroy-app/Dockerfile
index 4b4c577..38b244a 100644
--- a/tutorials/base/web/leeroy-app/Dockerfile
+++ b/tutorials/base/web/leeroy-app/Dockerfile
@@ -16,7 +16,7 @@ FROM golang:1.13.11-alpine3.10 as builder
 COPY app.go .
 RUN go build -o /app .
 
-FROM alpine:3.20
+FROM alpine:3.21
 # Define GOTRACEBACK to mark this container as using the Go language runtime
 # for `skaffold debug` (https://skaffold.dev/docs/workflows/debug/).
 ENV GOTRACEBACK=single
diff --git a/tutorials/base/web/leeroy-web/Dockerfile b/tutorials/base/web/leeroy-web/Dockerfile
index f0275f9..db88393 100644
--- a/tutorials/base/web/leeroy-web/Dockerfile
+++ b/tutorials/base/web/leeroy-web/Dockerfile
@@ -16,7 +16,7 @@ FROM golang:1.13.11-alpine3.10 as builder
 COPY web.go .
 RUN go build -o /web .
 
-FROM alpine:3.20
+FROM alpine:3.21
 # Define GOTRACEBACK to mark this container as using the Go language runtime
 # for `skaffold debug` (https://skaffold.dev/docs/workflows/debug/).
 ENV GOTRACEBACK=single
diff --git a/tutorials/exec-envs/web-exec-envs/leeroy-app-exec-envs/Dockerfile b/tutorials/exec-envs/web-exec-envs/leeroy-app-exec-envs/Dockerfile
index 4b4c577..38b244a 100644
--- a/tutorials/exec-envs/web-exec-envs/leeroy-app-exec-envs/Dockerfile
+++ b/tutorials/exec-envs/web-exec-envs/leeroy-app-exec-envs/Dockerfile
@@ -16,7 +16,7 @@ FROM golang:1.13.11-alpine3.10 as builder
 COPY app.go .
 RUN go build -o /app .
 
-FROM alpine:3.20
+FROM alpine:3.21
 # Define GOTRACEBACK to mark this container as using the Go language runtime
 # for `skaffold debug` (https://skaffold.dev/docs/workflows/debug/).
 ENV GOTRACEBACK=single
diff --git a/tutorials/exec-envs/web-exec-envs/leeroy-web-exec-envs/Dockerfile b/tutorials/exec-envs/web-exec-envs/leeroy-web-exec-envs/Dockerfile
index f0275f9..db88393 100644
--- a/tutorials/exec-envs/web-exec-envs/leeroy-web-exec-envs/Dockerfile
+++ b/tutorials/exec-envs/web-exec-envs/leeroy-web-exec-envs/Dockerfile
@@ -16,7 +16,7 @@ FROM golang:1.13.11-alpine3.10 as builder
 COPY web.go .
 RUN go build -o /web .
 
-FROM alpine:3.20
+FROM alpine:3.21
 # Define GOTRACEBACK to mark this container as using the Go language runtime
 # for `skaffold debug` (https://skaffold.dev/docs/workflows/debug/).
 ENV GOTRACEBACK=single
diff --git a/tutorials/private-targets/web-private-targets/leeroy-app/Dockerfile b/tutorials/private-targets/web-private-targets/leeroy-app/Dockerfile
index 4b4c577..38b244a 100644
--- a/tutorials/private-targets/web-private-targets/leeroy-app/Dockerfile
+++ b/tutorials/private-targets/web-private-targets/leeroy-app/Dockerfile
@@ -16,7 +16,7 @@ FROM golang:1.13.11-alpine3.10 as builder
 COPY app.go .
 RUN go build -o /app .
 
-FROM alpine:3.20
+FROM alpine:3.21
 # Define GOTRACEBACK to mark this container as using the Go language runtime
 # for `skaffold debug` (https://skaffold.dev/docs/workflows/debug/).
 ENV GOTRACEBACK=single
diff --git a/tutorials/private-targets/web-private-targets/leeroy-web/Dockerfile b/tutorials/private-targets/web-private-targets/leeroy-web/Dockerfile
index f0275f9..db88393 100644
--- a/tutorials/private-targets/web-private-targets/leeroy-web/Dockerfile
+++ b/tutorials/private-targets/web-private-targets/leeroy-web/Dockerfile
@@ -16,7 +16,7 @@ FROM golang:1.13.11-alpine3.10 as builder
 COPY web.go .
 RUN go build -o /web .
 
-FROM alpine:3.20
+FROM alpine:3.21
 # Define GOTRACEBACK to mark this container as using the Go language runtime
 # for `skaffold debug` (https://skaffold.dev/docs/workflows/debug/).
 ENV GOTRACEBACK=single
diff --git a/tutorials/profiles/web-profiles/leeroy-app-profiles/Dockerfile b/tutorials/profiles/web-profiles/leeroy-app-profiles/Dockerfile
index 4b4c577..38b244a 100644
--- a/tutorials/profiles/web-profiles/leeroy-app-profiles/Dockerfile
+++ b/tutorials/profiles/web-profiles/leeroy-app-profiles/Dockerfile
@@ -16,7 +16,7 @@ FROM golang:1.13.11-alpine3.10 as builder
 COPY app.go .
 RUN go build -o /app .
 
-FROM alpine:3.20
+FROM alpine:3.21
 # Define GOTRACEBACK to mark this container as using the Go language runtime
 # for `skaffold debug` (https://skaffold.dev/docs/workflows/debug/).
 ENV GOTRACEBACK=single
diff --git a/tutorials/profiles/web-profiles/leeroy-web-profiles/Dockerfile b/tutorials/profiles/web-profiles/leeroy-web-profiles/Dockerfile
index f0275f9..db88393 100644
--- a/tutorials/profiles/web-profiles/leeroy-web-profiles/Dockerfile
+++ b/tutorials/profiles/web-profiles/leeroy-web-profiles/Dockerfile
@@ -16,7 +16,7 @@ FROM golang:1.13.11-alpine3.10 as builder
 COPY web.go .
 RUN go build -o /web .
 
-FROM alpine:3.20
+FROM alpine:3.21
 # Define GOTRACEBACK to mark this container as using the Go language runtime
 # for `skaffold debug` (https://skaffold.dev/docs/workflows/debug/).
 ENV GOTRACEBACK=single
diff --git a/tutorials/verification-run/app-config/hello-verify/Dockerfile b/tutorials/verification-run/app-config/hello-verify/Dockerfile
index 06209fd..64bcfb0 100644
--- a/tutorials/verification-run/app-config/hello-verify/Dockerfile
+++ b/tutorials/verification-run/app-config/hello-verify/Dockerfile
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 FROM docker:26.1.3 as static-docker-source
-FROM alpine:3.15
+FROM alpine:3.21
 ARG CLOUD_SDK_VERSION=400.0.0
 ENV CLOUD_SDK_VERSION=$CLOUD_SDK_VERSION
 ENV PATH /google-cloud-sdk/bin:$PATH