diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e2458ba..013c43e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
       - name: Install Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.6.8
+          ruby-version: 2.7.8
           bundler-cache: true
 
       - name: RuboCop
@@ -27,7 +27,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby-version: ["2.6.8", "2.7.8", "3.0.6", "3.1.4", "3.2.3", "3.3.0"]
+        ruby-version: ["2.7.8", "3.0", "3.1", "3.2", "3.3", "3.4"]
 
     steps:
       - uses: actions/checkout@v2
diff --git a/.rubocop.yml b/.rubocop.yml
index 8c73e93..37f6f28 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,8 +1,9 @@
 inherit_from: .rubocop_todo.yml
 
 AllCops:
-  TargetRubyVersion: 2.6
+  TargetRubyVersion: 2.7
   NewCops: enable
+  SuggestExtensions: false
 
 Layout/LineLength:
   Enabled: false
diff --git a/devbox.json b/devbox.json
deleted file mode 100644
index 1be2d41..0000000
--- a/devbox.json
+++ /dev/null
@@ -1,10 +0,0 @@
-{
-  "$schema": "https://raw.githubusercontent.com/jetpack-io/devbox/main/.schema/devbox.schema.json",
-  "packages": ["ruby@2.6.8"],
-  "shell": {
-    "scripts": {
-      "test": ["bundle exec rspec $@"],
-      "lint": ["bundle exec rubocop -a $@"]
-    }
-  }
-}
diff --git a/devbox.lock b/devbox.lock
deleted file mode 100644
index 0ee8561..0000000
--- a/devbox.lock
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-  "lockfile_version": "1",
-  "packages": {
-    "ruby@2.6.8": {
-      "last_modified": "2021-10-22T02:15:45Z",
-      "plugin_version": "0.0.2",
-      "resolved": "github:NixOS/nixpkgs/718895c14907b60069520b6394b4dbb6e3aa9c33#ruby_2_6",
-      "source": "devbox-search",
-      "version": "2.6.8"
-    }
-  }
-}
diff --git a/lib/generators/vero_generator.rb b/lib/generators/vero_generator.rb
index 82dc490..affe948 100644
--- a/lib/generators/vero_generator.rb
+++ b/lib/generators/vero_generator.rb
@@ -9,7 +9,7 @@ def create_initializer_file
     type = options[:heroku] || 'standard'
 
     abort('You must provide an API KEY and API SECRET to proceed.') if options[:heroku].blank? && (options[:api_key].blank? || options[:api_secret].blank?)
-    create_file 'config/initializers/vero.rb', send("#{type}_initializer_content".to_sym)
+    create_file 'config/initializers/vero.rb', send("#{type}_initializer_content")
   end
 
   private
diff --git a/lib/vero/config.rb b/lib/vero/config.rb
index 6825d49..f477548 100644
--- a/lib/vero/config.rb
+++ b/lib/vero/config.rb
@@ -54,7 +54,7 @@ def update_attributes(attributes = {})
       return unless attributes.is_a?(Hash)
 
       Vero::Config.available_attributes.each do |symbol|
-        method_name = "#{symbol}=".to_sym
+        method_name = "#{symbol}="
         send(method_name, attributes[symbol]) if respond_to?(method_name) && attributes.key?(symbol)
       end
     end
diff --git a/lib/vero/trackable/base.rb b/lib/vero/trackable/base.rb
index 5a06a9b..1485f13 100644
--- a/lib/vero/trackable/base.rb
+++ b/lib/vero/trackable/base.rb
@@ -36,7 +36,7 @@ def to_vero
         end
 
         if other.is_a?(Array) && !other.empty?
-          other.select! { |i| (i.is_a?(Hash) && i.key?(:extras)) }
+          other.select! { |i| i.is_a?(Hash) && i.key?(:extras) }
           other.each do |h|
             symbol = h[:extras]
             t = respond_to?(symbol, true) ? send(symbol) : nil
diff --git a/vero.gemspec b/vero.gemspec
index 9a96e78..69f1dc8 100644
--- a/vero.gemspec
+++ b/vero.gemspec
@@ -12,14 +12,14 @@ Gem::Specification.new do |spec|
   spec.summary  = 'Ruby gem for Vero'
   spec.description = 'Ruby gem for Vero'
   spec.homepage = 'http://www.getvero.com/'
+  spec.metadata['rubygems_mfa_required'] = 'true'
 
   spec.files         = Dir['**/*']
   spec.executables   = Dir['bin/*'].map { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.required_ruby_version = '>= 2.6.6'
+  spec.required_ruby_version = '>= 2.7'
 
-  spec.add_runtime_dependency 'json'
-  spec.add_runtime_dependency 'rest-client'
-  spec.metadata['rubygems_mfa_required'] = 'true'
+  spec.add_dependency 'json'
+  spec.add_dependency 'rest-client'
 end