diff --git a/examples/demo/client/Dockerfile b/examples/demo/client/Dockerfile
index c96da549ab2b..59512cfb454d 100644
--- a/examples/demo/client/Dockerfile
+++ b/examples/demo/client/Dockerfile
@@ -5,6 +5,6 @@ WORKDIR /app/
 COPY . .
 RUN go env -w GOPROXY=direct
 RUN CGO_ENABLED=0 go build -o main main.go
-FROM alpine:3.20
+FROM alpine:3.21
 COPY --from=build /app/main  /app/main
 CMD ["/app/main"]
diff --git a/examples/demo/server/Dockerfile b/examples/demo/server/Dockerfile
index c96da549ab2b..59512cfb454d 100644
--- a/examples/demo/server/Dockerfile
+++ b/examples/demo/server/Dockerfile
@@ -5,6 +5,6 @@ WORKDIR /app/
 COPY . .
 RUN go env -w GOPROXY=direct
 RUN CGO_ENABLED=0 go build -o main main.go
-FROM alpine:3.20
+FROM alpine:3.21
 COPY --from=build /app/main  /app/main
 CMD ["/app/main"]