diff --git a/.codeclimate.yml b/.codeclimate.yml
index d097db5..e3e3bd5 100644
--- a/.codeclimate.yml
+++ b/.codeclimate.yml
@@ -23,4 +23,3 @@ ratings:
   - "**.rb"
 exclude_paths:
 - spec/
-
diff --git a/.rubocop.yml b/.rubocop.yml
index 3f1d222..ea39178 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,5 +1,6 @@
 AllCops:
   DisabledByDefault: true
+  TargetRubyVersion: 2.5
 
 #################### Lint ################################
 
diff --git a/moneybird.gemspec b/moneybird.gemspec
index e3ced18..c84dcc2 100644
--- a/moneybird.gemspec
+++ b/moneybird.gemspec
@@ -28,5 +28,6 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "rake", "~> 13.0"
   spec.add_development_dependency "simplecov", "= 0.21.2"
   spec.add_development_dependency "minitest"
+  spec.add_development_dependency "rubocop", "~> 0.52.1"
   spec.add_development_dependency "webmock", "~> 3.1"
 end