diff --git a/Dockerfile b/Dockerfile
index 4e1bb24ff8..28a77e460b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,7 +13,7 @@ ARG BASE_REGISTRY="docker.io"
 
 # Ruby image to use for base image, change with [--build-arg RUBY_VERSION="3.4.x"]
 # renovate: datasource=docker depName=docker.io/ruby
-ARG RUBY_VERSION="3.4.1"
+ARG RUBY_VERSION="3.4.2"
 # # Node version to use in base image, change with [--build-arg NODE_MAJOR_VERSION="20"]
 # renovate: datasource=node-version depName=node
 ARG NODE_MAJOR_VERSION="22"