diff --git a/Dockerfile b/Dockerfile
index aa1f041..c1d49de 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1
+# syntax=docker/dockerfile:1@sha256:87999aa3d42bdc6bea60565083ee17e86d1f3339802f543c0d03998580f9cb89
 # =============================================================================
 # Multi-architecture build
 # =============================================================================