diff --git a/Dockerfile b/Dockerfile
index b7401d3..6f0d8ea 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.20.0-alpine AS build
+FROM golang:1.20.1-alpine AS build
 MAINTAINER shunsuke maeda <duck8823@gmail.com>
 
 RUN apk --update add --no-cache alpine-sdk ca-certificates \