diff --git a/Dockerfile b/Dockerfile
index e6df0d9..bba7221 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:alpine as build
+FROM golang:alpine AS build
 
 RUN apk add --no-cache git
 
@@ -12,8 +12,8 @@ RUN go install -v ./...
 
 RUN go build -o main .
 
-FROM alpine:latest as certs
-RUN apk --update add ca-certificates
+FROM alpine:latest AS certs
+RUN apk --no-cache add ca-certificates
 
 FROM bash:latest
 COPY --from=certs /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt