diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e714830..14dca91 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -8,8 +8,8 @@ jobs:
       fail-fast: false
       matrix:
         ruby-version:
-          - '3.3'
           - '3.4'
+          - '4.0'
 
     name: Ruby ${{ matrix.ruby-version }}
 
diff --git a/.ruby-version b/.ruby-version
index 3b47f2e..7921bd0 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.3.9
+3.4.8
diff --git a/Gemfile b/Gemfile
index 8f55f2a..5dcc28c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
-# ruby '3.3.9'
+# ruby '3.4.8'
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 8.0.5'
diff --git a/Gemfile.lock b/Gemfile.lock
index 074915a..60e46af 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -402,4 +402,4 @@ DEPENDENCIES
   spring-watcher-listen (~> 2.0)
 
 BUNDLED WITH
-   2.5.22
+   2.6.9
diff --git a/config/deployments.yml b/config/deployments.yml
index 0c630b4..a3ca758 100644
--- a/config/deployments.yml
+++ b/config/deployments.yml
@@ -1,4 +1,4 @@
 ---
 live:
-  ruby: 3.3.9
+  ruby: 3.4.8
   branch: 'main'
diff --git a/vendor/rbenv/cache/ruby-3.3.9.tar.gz b/vendor/rbenv/cache/ruby-3.4.8.tar.gz
similarity index 68%
rename from vendor/rbenv/cache/ruby-3.3.9.tar.gz
rename to vendor/rbenv/cache/ruby-3.4.8.tar.gz
index 7d4bd49..7276718 100644
Binary files a/vendor/rbenv/cache/ruby-3.3.9.tar.gz and b/vendor/rbenv/cache/ruby-3.4.8.tar.gz differ
diff --git a/vendor/rbenv/rbenv.tar.gz b/vendor/rbenv/rbenv.tar.gz
index cfb2043..1e1f6cd 100644
Binary files a/vendor/rbenv/rbenv.tar.gz and b/vendor/rbenv/rbenv.tar.gz differ
diff --git a/vendor/rbenv/ruby-build.tar.gz b/vendor/rbenv/ruby-build.tar.gz
index 4e14804..2916c11 100644
Binary files a/vendor/rbenv/ruby-build.tar.gz and b/vendor/rbenv/ruby-build.tar.gz differ