diff --git a/.rubocop.yml b/.rubocop.yml
new file mode 100644
index 0000000..53e4b99
--- /dev/null
+++ b/.rubocop.yml
@@ -0,0 +1,28 @@
+AllCops:
+  TargetRubyVersion: 2.3
+
+Lint/RaiseException:
+  Enabled: true
+
+Lint/StructNewOverride:
+  Enabled: true
+
+
+Metrics:
+  Enabled: false
+
+
+Style/FrozenStringLiteralComment:
+  Enabled: false
+
+Style/Documentation:
+  Enabled: false
+
+Style/HashEachMethods:
+  Enabled: true
+
+Style/HashTransformKeys:
+  Enabled: true
+
+Style/HashTransformValues:
+  Enabled: true
diff --git a/Gemfile.lock b/Gemfile.lock
index d0395dd..18d2f84 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -12,62 +12,59 @@ GEM
     ast (2.4.2)
     crack (0.4.5)
       rexml
-    diff-lcs (1.4.4)
+    diff-lcs (1.5.0)
     hashdiff (1.0.1)
-    json (2.5.1)
+    jaro_winkler (1.5.4)
+    json (2.6.2)
     mixlib-cli (1.7.0)
-    parallel (1.20.1)
-    parser (3.0.2.0)
+    parallel (1.22.1)
+    parser (3.1.2.0)
       ast (~> 2.4.1)
-    public_suffix (4.0.6)
-    rainbow (3.0.0)
+    public_suffix (4.0.7)
+    rainbow (3.1.1)
     rake (13.0.6)
-    regexp_parser (2.1.1)
     rexml (3.2.5)
-    rspec (3.10.0)
-      rspec-core (~> 3.10.0)
-      rspec-expectations (~> 3.10.0)
-      rspec-mocks (~> 3.10.0)
-    rspec-core (3.10.1)
-      rspec-support (~> 3.10.0)
-    rspec-expectations (3.10.1)
+    rspec (3.11.0)
+      rspec-core (~> 3.11.0)
+      rspec-expectations (~> 3.11.0)
+      rspec-mocks (~> 3.11.0)
+    rspec-core (3.11.0)
+      rspec-support (~> 3.11.0)
+    rspec-expectations (3.11.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.10.0)
-    rspec-mocks (3.10.2)
+      rspec-support (~> 3.11.0)
+    rspec-mocks (3.11.1)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.10.0)
-    rspec-support (3.10.2)
-    rubocop (0.93.1)
+      rspec-support (~> 3.11.0)
+    rspec-support (3.11.0)
+    rubocop (0.81.0)
+      jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
-      parser (>= 2.7.1.5)
+      parser (>= 2.7.0.1)
       rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 1.8)
       rexml
-      rubocop-ast (>= 0.6.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 2.0)
-    rubocop-ast (1.8.0)
-      parser (>= 3.0.1.1)
     ruby-progressbar (1.11.0)
     sensu-plugin (2.7.1)
       json (< 3.0.0)
       mixlib-cli (~> 1.5)
-    unicode-display_width (1.7.0)
-    webmock (3.13.0)
-      addressable (>= 2.3.6)
+    unicode-display_width (1.8.0)
+    webmock (3.14.0)
+      addressable (>= 2.8.0)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)
 
 PLATFORMS
-  x86_64-linux
+  ruby
 
 DEPENDENCIES
-  bundler (~> 2.2)
+  bundler (~> 2.1)
   rake (~> 13.0)
   rspec (~> 3.10)
-  rubocop (~> 0.54)
+  rubocop (~> 0.54, <= 0.81)
   sensu-plugins-minio!
   webmock (~> 3.3)
 
 BUNDLED WITH
-   2.2.23
+   2.1.4
diff --git a/README.md b/README.md
index 0be5c53..810bd80 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,8 @@
 # Sensu check for minio updates
 
+Translates the presence of an outdated minio server instance into sensu check
+results to reduce the time-to-patch for minio systems.
+
 ## Installation
 
 Add this line to your application's Gemfile:
@@ -24,7 +27,7 @@ Check if a the local minio version is in the most recent version
 Checks will check the default URL https://dl.min.io/server/minio/release 
 and the default Platform linux-amd64 for updates. Adjust these optional 
 parameters if you want to check a different platform or for whatever 
-reason need to check a differen URL.
+reason need to check a different URL.
 
 | Parameter          | Description                                     |
 | ------------------ | ----------------------------------------------- |
diff --git a/bin/check-minio-update.rb b/bin/check-minio-update.rb
index f3cb9cf..d0541f6 100755
--- a/bin/check-minio-update.rb
+++ b/bin/check-minio-update.rb
@@ -46,7 +46,6 @@ def run
     begin
       Timeout.timeout(timeout) do
         latest_version = get_latest_version(checkurl, platform)
-        local_version = get_local_version
 
         if local_version == latest_version
           ok 'No new minio version available'
@@ -55,12 +54,14 @@ def run
         end
       end
     rescue IOError => e
-      unknown "#{e.message}"
+      unknown e.message.to_s
     rescue Timeout::Error
       unknown 'Connection timed out'
     end
   end
 
+  private
+
   def get_latest_version(checkurl, platform)
     uri = URI.parse("#{checkurl}/#{platform}/minio.shasum")
     response = Net::HTTP.get_response(uri)
@@ -69,14 +70,18 @@ def get_latest_version(checkurl, platform)
       raise IOError, "Unable to gather latest minio version: #{response.body}"
     end
 
-    return response.body.split.last.split('.', 2).last
+    response.body.split.last.split('.', 2).last
   end
 
-  def get_local_version
-    stdout, stderr, status = Open3.capture3({ 'PATH' => ENV['PATH'] }, 'minio --version', :unsetenv_others => true)
+  def local_version
+    stdout, stderr, status = Open3.capture3(
+      { 'PATH' => ENV['PATH'] }, 'minio --version', unsetenv_others: true
+    )
 
-    raise IOError, "Unable to gather local minio version: #{stderr}" unless status.success?
+    unless status.success?
+      raise IOError, "Unable to gather local minio version: #{stderr}"
+    end
 
-    return stdout.split.last
+    stdout.split.last
   end
 end
diff --git a/sensu-plugins-minio.gemspec b/sensu-plugins-minio.gemspec
index 889a4f1..10828e3 100644
--- a/sensu-plugins-minio.gemspec
+++ b/sensu-plugins-minio.gemspec
@@ -11,20 +11,23 @@ Gem::Specification.new do |spec|
   spec.authors       = ['Hauke Altmann', 'Jonathan Schlue']
   spec.email         = ['info@aboutsource.net']
 
-  spec.summary       = 'Check if there are updates for the local minio server instance'
+  spec.summary       = 'Check if there are updates for the local '\
+                       'minio server instance'
   spec.description   = 'Used to check for manual installed minio servers'
   spec.homepage      = 'https://github.com/aboutsource/sensu-plugins-minio'
   spec.require_paths = ['lib']
 
-  spec.executables = Dir.glob('bin/**/*.rb').map { |file| File.basename(file) }
+  spec.required_ruby_version = '>= 2.3.3'
+
+  spec.executables = Dir.glob('bin/**/*.rb').map { |f| File.basename(f) }
   spec.files = `git ls-files -z`.split("\x0").reject do |f|
     f.match(%r{^(test|spec|features)/})
   end
 
   spec.add_dependency 'sensu-plugin', '~> 2.1'
-  spec.add_development_dependency 'bundler', '~> 2.2'
+  spec.add_development_dependency 'bundler', '~> 2.1'
   spec.add_development_dependency 'rake', '~> 13.0'
   spec.add_development_dependency 'rspec', '~> 3.10'
-  spec.add_development_dependency 'rubocop', '~> 0.54'
+  spec.add_development_dependency 'rubocop', '~> 0.54', '<= 0.81'
   spec.add_development_dependency 'webmock', '~> 3.3'
 end
diff --git a/spec/check-minio-update_spec.rb b/spec/check_minio_update_spec.rb
similarity index 71%
rename from spec/check-minio-update_spec.rb
rename to spec/check_minio_update_spec.rb
index 9071099..6a89e80 100644
--- a/spec/check-minio-update_spec.rb
+++ b/spec/check_minio_update_spec.rb
@@ -9,7 +9,9 @@
   before do
     stub_checksum_request
     allow(check).to(receive(:output))
-    allow(Open3).to(receive(:capture3).and_return([stdout, stderr, double(:success? => success)]))
+    allow(Open3).to(
+      receive(:capture3).and_return([stdout, stderr, double(success?: success)])
+    )
   end
 
   let(:checksum_request) do
@@ -20,7 +22,12 @@
   end
 
   let(:response) do
-    { body: '285ec90006a6961ebcb7dd9685acc0ebcd08f561 minio.RELEASE.2021-07-08T19-43-25Z', status: 200 }
+    {
+      body:
+        '285ec90006a6961ebcb7dd9685acc0ebcd08f561 '\
+        'minio.RELEASE.2021-07-08T19-43-25Z',
+      status: 200
+    }
   end
 
   alias_method :stub_checksum_request, :checksum_request
@@ -43,14 +50,21 @@
         expect(error.status).to eq 0
       end
 
-      expect(check).to have_received(:output).with('No new minio version available')
+      expect(check).to have_received(:output).with(
+        'No new minio version available'
+      )
       expect(checksum_request).to have_been_requested
     end
   end
 
   context 'with different local and remote versions' do
     let(:response) do
-      { body: '285ec90006a6961ebcb7dd9685acc0ebcd08f561 minio.RELEASE.2022-07-08T19-43-25Z', status: 200 }
+      {
+        body:
+          '285ec90006a6961ebcb7dd9685acc0ebcd08f561 '\
+          'minio.RELEASE.2022-07-08T19-43-25Z',
+        status: 200
+      }
     end
 
     it 'should be critical' do
@@ -59,7 +73,9 @@
         expect(error.status).to eq 2
       end
 
-      expect(check).to have_received(:output).with('New minio version available RELEASE.2022-07-08T19-43-25Z')
+      expect(check).to have_received(:output).with(
+        'New minio version available RELEASE.2022-07-08T19-43-25Z'
+      )
       expect(checksum_request).to have_been_requested
     end
   end
@@ -75,7 +91,9 @@
         expect(error.status).to eq 3
       end
 
-      expect(check).to have_received(:output).with('Unable to gather local minio version: Minio not found')
+      expect(check).to have_received(:output).with(
+        'Unable to gather local minio version: Minio not found'
+      )
       expect(checksum_request).to have_been_requested
     end
   end
@@ -89,7 +107,9 @@
         expect(error.status).to eq 3
       end
 
-      expect(check).to have_received(:output).with('Unable to gather latest minio version: 404 Not Found')
+      expect(check).to have_received(:output).with(
+        'Unable to gather latest minio version: 404 Not Found'
+      )
       expect(checksum_request).to have_been_requested
     end
   end