diff --git a/.circleci/config.yml b/.circleci/config.yml
index 6cb4880..5267bf8 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -30,7 +30,7 @@ jobs:
     working_directory: ~/rails_template
     docker:
       - &ruby_docker
-        image: cimg/ruby:3.2.5-browsers
+        image: cimg/ruby:3.3.5-browsers
         environment:
           RAILS_ENV: test
     steps:
diff --git a/.tool-versions b/.tool-versions
index 7a29313..5e8cc04 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,4 +1,4 @@
-ruby 3.2.5
+ruby 3.3.5
 awscli 2.11.24
 yarn 1.22.10
 nodejs 18.18.0
diff --git a/Dockerfile b/Dockerfile
index 8cc4ad2..3b99ed6 100644
--- a/Dockerfile
+++ b/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=3.2.5
+ARG RUBY_VERSION=3.3.5
 FROM ruby:$RUBY_VERSION-slim as base
 
 # Rails app lives here