diff --git a/Dockerfile b/Dockerfile
index 731e9ad..c02d86d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.20-alpine as builder
+FROM golang:1.21-alpine as builder
 WORKDIR /go/src/github.com/moov-io/metro2
 RUN apk add -U git make
 RUN adduser -D -g '' --shell /bin/false moov
diff --git a/Dockerfile-fuzz b/Dockerfile-fuzz
index 4d77128..f522769 100644
--- a/Dockerfile-fuzz
+++ b/Dockerfile-fuzz
@@ -1,4 +1,4 @@
-FROM golang:1.20 as builder
+FROM golang:1.21 as builder
 LABEL maintainer="Moov <oss@moov.io>"
 RUN apt-get update -qq && apt-get install -y git make
 WORKDIR /go/src/github.com/moov-io/metro2