diff --git a/Dockerfile b/Dockerfile
index 27d6dae..e315af0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.20.7-alpine AS builder
+FROM golang:1.21.0-alpine AS builder
 WORKDIR /go/src/github.com/ingmarstein/mielesolar/
 COPY . .
 RUN apk add -U --no-cache ca-certificates git \