diff --git a/Dockerfile b/Dockerfile
index 414dd7b..53add19 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 ##############
 # base image #
 ##############
-FROM registry.access.redhat.com/ubi9/python-312 AS base
+FROM registry.access.redhat.com/ubi9/python-312@sha256:bcdbab62d80f7dd88b4c2ce69a5cf8e9e1e367ac39b2e5d7f5d3f532d936ec80 AS base
 
 COPY        LICENSE /licenses/LICENSE