diff --git a/reproducible-builds/Dockerfile b/reproducible-builds/Dockerfile
index 92648a415b..3fed2e10d5 100644
--- a/reproducible-builds/Dockerfile
+++ b/reproducible-builds/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:22.04
+FROM ubuntu:jammy-20230624@sha256:b060fffe8e1561c9c3e6dea6db487b900100fc26830b9ea2ec966c151ab4c020
 
 COPY docker/ docker/
 COPY docker/apt.conf docker/sources.list /etc/apt/