diff --git a/Dockerfile b/Dockerfile
index 1439627..d82d6d1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,12 +1,10 @@
-FROM golang:1.21 AS builder
+FROM golang:1.22 AS builder
 LABEL fnkit.fn="true"
 WORKDIR /app
-COPY go.* ./
-RUN go mod download
 COPY . .
-RUN CGO_ENABLED=0 GOOS=linux go build -o server ./cmd/main.go
+RUN go mod tidy && CGO_ENABLED=0 GOOS=linux go build -o server ./cmd/main.go
 
-FROM gcr.io/distroless/static-debian11
+FROM gcr.io/distroless/static-debian12
 COPY --from=builder /app/server /server
 ENV FUNCTION_TARGET=HelloWorld
 EXPOSE 8080