diff --git a/Dockerfile b/Dockerfile
index d82a540..14b2e9f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.14.0-buster as builder
+FROM golang:1.21-buster as builder
 WORKDIR /go
 COPY ./ .
 RUN export GOPATH= && go mod download && go build -o /go/ -v -ldflags '-s -w' ./cmd/kamimai