diff --git a/test.Dockerfile b/test.Dockerfile
index 08550416b..a6f358c07 100644
--- a/test.Dockerfile
+++ b/test.Dockerfile
@@ -1 +1 @@
-FROM buildpack-deps:bookworm-curl
+FROM buildpack-deps:bookworm-curl@sha256:41a24bb5f87a336e821481c8495904b7ccab850ddb7d3c7819c2c4e2c7fb7cb9