diff --git a/.ruby-version b/.ruby-version
index 0bee604..ec1cf33 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.3.3
+2.6.3
diff --git a/cw-style.gemspec b/cw-style.gemspec
index df45fef..fe4c788 100644
--- a/cw-style.gemspec
+++ b/cw-style.gemspec
@@ -28,10 +28,11 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.add_dependency "rubocop", ">= 0.53.0"
+  spec.add_dependency "rubocop", ">= 0.74.0"
   spec.add_dependency "rubocop-rspec-focused", "= 0.0.3"
   spec.add_dependency "rubocop-thread_safety"
-  spec.add_development_dependency "bundler", "~> 1.15"
+  spec.add_dependency "rubocop-rails"
+  spec.add_development_dependency "bundler", "~> 2.0.2"
   spec.add_development_dependency "rake", "~> 10.0"
   spec.add_development_dependency "rspec"
   spec.add_development_dependency "debugger-ruby_core_source"
diff --git a/default.yml b/default.yml
index 54bbe8b..07d45d1 100644
--- a/default.yml
+++ b/default.yml
@@ -1,12 +1,13 @@
 require:
   - rubocop/rspec/focused
   - rubocop-thread_safety
+  - rubocop-rails
   - ./lib/unless_with_multiple_conditions
   - ./lib/private_attribute_accessors
   - ./lib/update_not_update_attributes
 
 AllCops:
-  TargetRubyVersion: 2.3
+  TargetRubyVersion: 2.6
   Exclude:
     - '*.gemspec'
 
diff --git a/lib/charity_water/style/version.rb b/lib/charity_water/style/version.rb
index 299a270..3db180c 100644
--- a/lib/charity_water/style/version.rb
+++ b/lib/charity_water/style/version.rb
@@ -1,5 +1,5 @@
 module CharityWater
   module Style
-    VERSION = '2.2.0'.freeze
+    VERSION = '3.0.0'.freeze
   end
 end
diff --git a/spec/private_attribute_accessors_spec.rb b/spec/private_attribute_accessors_spec.rb
index 07ba16e..f9d80cf 100644
--- a/spec/private_attribute_accessors_spec.rb
+++ b/spec/private_attribute_accessors_spec.rb
@@ -25,7 +25,7 @@ def parse_source(source, file = nil)
       file = file.path
     end
 
-    RuboCop::ProcessedSource.new(source, 2.3, file)
+    RuboCop::ProcessedSource.new(source, 2.6, file)
   end
 
   def _investigate(cop, processed_source)
diff --git a/spec/unless_with_multiple_conditions_spec.rb b/spec/unless_with_multiple_conditions_spec.rb
index 31857f9..becc37f 100644
--- a/spec/unless_with_multiple_conditions_spec.rb
+++ b/spec/unless_with_multiple_conditions_spec.rb
@@ -23,7 +23,7 @@ def parse_source(source, file = nil)
       file = file.path
     end
 
-    RuboCop::ProcessedSource.new(source, 2.3, file)
+    RuboCop::ProcessedSource.new(source, 2.6, file)
   end
 
   def _investigate(cop, processed_source)
diff --git a/spec/update_not_update_attributes_spec.rb b/spec/update_not_update_attributes_spec.rb
index f4a1f82..85a9753 100644
--- a/spec/update_not_update_attributes_spec.rb
+++ b/spec/update_not_update_attributes_spec.rb
@@ -23,7 +23,7 @@ def parse_source(source, file = nil)
       file = file.path
     end
 
-    RuboCop::ProcessedSource.new(source, 2.3, file)
+    RuboCop::ProcessedSource.new(source, 2.6, file)
   end
 
   def _investigate(cop, processed_source)