diff --git a/.goreleaser.Dockerfile b/.goreleaser.Dockerfile
index 2c0e00b..77bc672 100644
--- a/.goreleaser.Dockerfile
+++ b/.goreleaser.Dockerfile
@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1
+# syntax=docker/dockerfile:1@sha256:9857836c9ee4268391bb5b09f9f157f3c91bb15821bb77969642813b0d00518d
 
 ## Setup stage
 FROM alpine:3.21.0@sha256:21dc6063fd678b478f57c0e13f47560d0ea4eeba26dfc947b2a4f81f686b9f45 as builder
diff --git a/Dockerfile b/Dockerfile
index 6c469fc..5198345 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1
+# syntax=docker/dockerfile:1@sha256:9857836c9ee4268391bb5b09f9f157f3c91bb15821bb77969642813b0d00518d
 
 ## Build stage
 FROM golang:1.23.4-alpine@sha256:6c5c9590f169f77c8046e45c611d3b28fe477789acd8d3762d23d4744de69812 as build