diff --git a/app-rails/.ruby-version b/app-rails/.ruby-version
index 15a2799..bea438e 100644
--- a/app-rails/.ruby-version
+++ b/app-rails/.ruby-version
@@ -1 +1 @@
-3.3.0
+3.3.1
diff --git a/app-rails/Dockerfile b/app-rails/Dockerfile
index 5fe1152..dc36d21 100644
--- a/app-rails/Dockerfile
+++ b/app-rails/Dockerfile
@@ -1,7 +1,7 @@
 # syntax = docker/dockerfile:1
 
 # Make sure RUBY_VERSION matches the Ruby version in .ruby-version and Gemfile
-ARG RUBY_VERSION=3.3.0
+ARG RUBY_VERSION=3.3.1
 
 
 ##########################################################################################
diff --git a/app-rails/Gemfile b/app-rails/Gemfile
index 3c710ca..8c80cac 100644
--- a/app-rails/Gemfile
+++ b/app-rails/Gemfile
@@ -1,6 +1,6 @@
 source "https://rubygems.org"
 
-ruby "3.3.0"
+ruby "3.3.1"
 
 # Bundle edge Rails instead: gem "rails", github: "rails/rails", branch: "main"
 gem "rails", "~> 7.1.3", ">= 7.1.3.2"
diff --git a/app-rails/Gemfile.lock b/app-rails/Gemfile.lock
index 256dc02..4a1645a 100644
--- a/app-rails/Gemfile.lock
+++ b/app-rails/Gemfile.lock
@@ -493,7 +493,7 @@ DEPENDENCIES
   web-console
 
 RUBY VERSION
-   ruby 3.3.0p0
+   ruby 3.3.1p55
 
 BUNDLED WITH
    2.5.6
diff --git a/app-rails/README.md b/app-rails/README.md
index 5434bbd..c416d6c 100644
--- a/app-rails/README.md
+++ b/app-rails/README.md
@@ -72,7 +72,7 @@ In either case, first generate a `.env` file:
 
 Prerequisites:
 
-- Ruby 3.3.0
+- Ruby 3.3.1
 - [Node LTS](https://nodejs.org/en)
 - (Optional but recommended): [rbenv](https://github.com/rbenv/rbenv)