diff --git a/.goreleaser.Dockerfile b/.goreleaser.Dockerfile
index 5d4faa8..0322f0e 100644
--- a/.goreleaser.Dockerfile
+++ b/.goreleaser.Dockerfile
@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1
+# syntax=docker/dockerfile:1@sha256:38387523653efa0039f8e1c89bb74a30504e76ee9f565e25c9a09841f9427b05
 
 ## Setup stage
 FROM alpine:3.22.1@sha256:4bcff63911fcb4448bd4fdacec207030997caf25e9bea4045fa6c8c44de311d1 as builder
diff --git a/Dockerfile b/Dockerfile
index 1543d4b..72984ab 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1
+# syntax=docker/dockerfile:1@sha256:38387523653efa0039f8e1c89bb74a30504e76ee9f565e25c9a09841f9427b05
 
 ## Build stage
 FROM golang:1.24.5-alpine@sha256:daae04ebad0c21149979cd8e9db38f565ecefd8547cf4a591240dc1972cf1399 as build