diff --git a/Dockerfile b/Dockerfile
index ef054ee..2c949fb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,9 @@
-# syntax=docker/dockerfile:1.7
+# syntax=docker/dockerfile:1.7@sha256:a57df69d0ea827fb7266491f2813635de6f17269be881f696fbfdf2d83dda33e
 
 ARG TARGETOS
 ARG TARGETARCH
 
-FROM golang:1.27.1-bookworm AS build
+FROM golang:1.27.1-bookworm@sha256:69a7b9788769bec032d238959b61854e9ae87f57be9029ec04e9885fabf99195 AS build
 
 ARG TARGETOS
 ARG TARGETARCH