diff --git a/Dockerfile b/Dockerfile
index da2e9f36..a5a80750 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@ WORKDIR /go/src/github.com/mackerelio/mkr/
 COPY . .
 RUN make build
 
-FROM alpine:3.19.1
+FROM alpine:3.20.0
 RUN apk add --no-cache ca-certificates
 COPY --from=builder /go/src/github.com/mackerelio/mkr/mkr /usr/local/bin/
 ENTRYPOINT ["/usr/local/bin/mkr"]