diff --git a/ci/dockerfiles/autoscaler-tools/Dockerfile b/ci/dockerfiles/autoscaler-tools/Dockerfile
index e534c5912e..3bc2fcac2d 100644
--- a/ci/dockerfiles/autoscaler-tools/Dockerfile
+++ b/ci/dockerfiles/autoscaler-tools/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:jammy
+FROM ubuntu:noble@sha256:8a37d68f4f73ebf3d4efafbcf66379bf3728902a8038616808f04e34a9ab63ee
 MAINTAINER autoscaler-team
 
 ENV DEBIAN_FRONTEND="noninteractive" TZ="Europe/London"