diff --git a/Dockerfile b/Dockerfile
index e815008..d5908ee 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
-# syntax=docker/dockerfile:1
+# syntax=docker/dockerfile:1@sha256:4edf897a3ffa55b89f906fc8cc78afdb3f1834cc9c7083565e611a8a7d5fe99e
 
-FROM oven/bun:1.4.2 AS base
+FROM oven/bun:1.4.2@sha256:9114c058aeae42162ee16dd5084b95fe9473970bb6bcb5b232ab1630f0546895 AS base
 WORKDIR /app
 
 # Build