diff --git a/Dockerfile b/Dockerfile
index 8ba7ad7..e0bee5a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -41,7 +41,7 @@ ARG BINARY=source
 # source: compile touchmark for the target platform on the build platform,
 # with the flags .goreleaser.yaml uses (and -buildvcs=false: the build
 # context has no .git).
-FROM --platform=$BUILDPLATFORM golang:1.26.8-alpine3.24@sha256:8ac98ca534ac3f51e1f420a1dd2c15e74c75cfa0f23f3ad27eb5d7236c349a0c AS source
+FROM --platform=$BUILDPLATFORM golang:1.27.1-alpine3.24@sha256:8a5910f31396cd4d89662f56c68b3ae31d374308270a1c3bd96672ee5ed43414 AS source
 ARG TARGETOS
 ARG TARGETARCH
 ARG VERSION=dev