diff --git a/Dockerfile b/Dockerfile
index 046ab7cdd958cd2ca382cc484b98bd3018f46fe0..0e58089f2be8d69b6e1ac2b0fe70cb553dc1523c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # renovate: datasource=docker
-ARG UBUNTU_IMAGE_TAG=24.04
+ARG UBUNTU_IMAGE_TAG=24.04@sha256:e3f92abc0967a6c19d0dfa2d55838833e947b9d74edbcb0113e48535ad4be12a
 FROM ubuntu:${UBUNTU_IMAGE_TAG}
 
 ARG WITH_IPERF=1