diff --git a/Dockerfile b/Dockerfile
index dbeef4c..eba9361 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1.8
+# syntax=docker/dockerfile:1.9
 FROM lukemathwalker/cargo-chef:latest-rust-1.74.0 AS chef
 WORKDIR /app