diff --git a/dockerfiles/alpine.Dockerfile b/dockerfiles/alpine.Dockerfile
index 4c0075e..d7e2ed0 100644
--- a/dockerfiles/alpine.Dockerfile
+++ b/dockerfiles/alpine.Dockerfile
@@ -1,5 +1,6 @@
 ARG RUBY_VERSION="3.4.3"
-FROM docker.io/library/ruby:${RUBY_VERSION}-alpine AS base
+ARG BASE_REGISTRY="docker.io"
+FROM ${BASE_REGISTRY}/ruby:${RUBY_VERSION}-alpine AS base
 
 WORKDIR /kubernaut
 
diff --git a/dockerfiles/bookworm.Dockerfile b/dockerfiles/bookworm.Dockerfile
index 9863d78..89fb6f2 100644
--- a/dockerfiles/bookworm.Dockerfile
+++ b/dockerfiles/bookworm.Dockerfile
@@ -1,5 +1,6 @@
 ARG RUBY_VERSION="3.4.3"
-FROM docker.io/library/ruby:${RUBY_VERSION}-slim-bookworm AS base
+ARG BASE_REGISTRY="docker.io"
+FROM ${BASE_REGISTRY}/ruby:${RUBY_VERSION}-slim-bookworm AS base
 
 WORKDIR /kubernaut