diff --git a/Dockerfile b/Dockerfile
index 8a8aa45..639cdc7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1.4
+# syntax=docker/dockerfile:1.4@sha256:9ba7531bd80fb0a858632727cf7a112fbfd19b17e94c4e84ced81e24ef1a0dbc
 FROM docker.io/library/gradle:8.4.0-jdk17@sha256:9fde0212a97ab5c96e17797bba1f4f63c223a5ca04131d8dbafce038c53c4eb3 AS build
 WORKDIR /home/gradle/src
 ENV GRADLE_USER_HOME /gradle