diff --git a/build/container/Dockerfile.tmpl.erb b/build/container/Dockerfile.tmpl.erb
index 66c727258..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:4.0.0
+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%> .