From 54ea1bcb46c96988c9d0a8f26e02b46520e96d8d Mon Sep 17 00:00:00 2001
From: "renovate[bot]" <29139614+renovate[bot]@users.noreply.github.com>
Date: Tue, 3 Feb 2026 14:58:14 +0000
Subject: [PATCH] chore(deps): update docker.io/ruby docker tag to v4

---
 build/container/Dockerfile.tmpl.erb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build/container/Dockerfile.tmpl.erb b/build/container/Dockerfile.tmpl.erb
index 4c3da5309..5fe601535 100644
--- a/build/container/Dockerfile.tmpl.erb
+++ b/build/container/Dockerfile.tmpl.erb
@@ -6,7 +6,7 @@
 # Review the version of Ruby to be used periodically from :
 # https://hub.docker.com/_/ruby
 # "-slim" image not used because rmagick requires native compilation
-FROM docker.io/ruby:3.4.8
+FROM docker.io/ruby:4.0.1
 #erb: if arg_gem.end_with?('.gem')
 # For beta, gem is file, then copy it.
 COPY <%=arg_gem%> .