diff --git a/docker/ghost-dev/Dockerfile b/docker/ghost-dev/Dockerfile
index 3ef7694e47f..1b55db2fa47 100644
--- a/docker/ghost-dev/Dockerfile
+++ b/docker/ghost-dev/Dockerfile
@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1
+# syntax=docker/dockerfile:1@sha256:87999aa3d42bdc6bea60565083ee17e86d1f3339802f543c0d03998580f9cb89
 # Minimal Development Dockerfile for Ghost Core
 # Source code is mounted at runtime for hot-reload support