diff --git a/test.Dockerfile b/test.Dockerfile
index 9ee14137b..e09dc6ea9 100644
--- a/test.Dockerfile
+++ b/test.Dockerfile
@@ -1 +1 @@
-FROM buildpack-deps:bookworm
+FROM buildpack-deps:bookworm@sha256:00c78ee58ea28f20fe59f889632d9ec9c99f176e41a6034ddd6a3c892e634b56