diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eb34b98c..4e296fb3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -47,7 +47,7 @@ jobs:
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: '3.3.6'
+        ruby-version: '3.4.1'
         bundler-cache: true
     - uses: pnpm/action-setup@v4
     - name: Set up Node
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 18e47549..46adf4ea 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -35,7 +35,7 @@ jobs:
       if: steps.changed-files.outputs.any_changed == 'true'
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: '3.3.6'
+        ruby-version: '3.4.1'
         bundler-cache: true
     - name: Run RuboCop
       if: steps.changed-files.outputs.any_changed == 'true'
@@ -65,7 +65,7 @@ jobs:
       if: steps.changed-files.outputs.any_changed == 'true'
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: '3.3.6'
+        ruby-version: '3.4.1'
         bundler-cache: true
     - name: Run i18n-tasks health
       if: steps.changed-files.outputs.any_changed == 'true'
@@ -93,7 +93,7 @@ jobs:
       if: steps.changed-files.outputs.any_changed == 'true'
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: '3.3.6'
+        ruby-version: '3.4.1'
         bundler-cache: true
     - name: Run Slim-Lint
       if: steps.changed-files.outputs.any_changed == 'true'
diff --git a/.github/workflows/security.yml b/.github/workflows/security.yml
index 6668ac90..6773f3d6 100644
--- a/.github/workflows/security.yml
+++ b/.github/workflows/security.yml
@@ -22,7 +22,7 @@ jobs:
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: '3.3.6'
+        ruby-version: '3.4.1'
         bundler-cache: false
     - name: Bundle audit
       run: |
@@ -43,7 +43,7 @@ jobs:
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: '3.3.6'
+        ruby-version: '3.4.1'
         bundler-cache: false
     - name: Bundle leak
       run: |
diff --git a/Gemfile b/Gemfile
index 26009aff..5ff6c6e6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,7 +3,7 @@
 source 'https://rubygems.org'
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
-ruby '3.3.6'
+ruby '3.4.1'
 
 gem 'rails', '7.2.2.1'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index e8f6bf1c..7f21c3c3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -173,7 +173,6 @@ GEM
     net-protocol (0.2.2)
       timeout
     net-smtp (0.5.0)
-      net-protocol
     newrelic_rpm (9.17.0)
     nio4r (2.7.4)
     nokogiri (1.18.2)
@@ -418,7 +417,7 @@ DEPENDENCIES
   webmock
 
 RUBY VERSION
-   ruby 3.3.6p108
+   ruby 3.4.1p0
 
 BUNDLED WITH
    2.6.3
diff --git a/README.md b/README.md
index dec781f9..b5011103 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@
 
 This is an opinionated starter web application based on the following technology stack:
 
-* [Ruby 3.3.6][:ruby-url]
+* [Ruby 3.4.1][:ruby-url]
 * [Rails 7.2.2.1][:ruby-on-rails-url]
 * [Webpack 5][:webpack-url] (via [Shakapacker][:shakapacker-url])
 * [pnpm][:pnpm-url]
diff --git a/app/views/pages/home.html.slim b/app/views/pages/home.html.slim
index 98c0c876..e753995b 100644
--- a/app/views/pages/home.html.slim
+++ b/app/views/pages/home.html.slim
@@ -7,7 +7,7 @@ h1.mt-3
 ul.list-inline.lead
   li.list-inline-item
     | Ruby
-    small.text-body-secondary< 3.3.6
+    small.text-body-secondary< 3.4.1
   li.list-inline-item
     | Rails
     small.text-body-secondary< 7.2.2.1