diff --git a/.rubocop.yml b/.rubocop.yml
index 78c60ea..0f943f7 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -108,11 +108,6 @@ SelfAssignment:
 SignalException:
   Enabled: false
 
-# Offense count: 53
-# Cop supports --auto-correct.
-SingleSpaceBeforeFirstArg:
-  Enabled: false
-
 SpaceAroundOperators:
   Enabled: false
 
@@ -304,10 +299,6 @@ Style/NumericLiterals:
 Metrics/ParameterLists:
   Enabled: false
 
-Style/TrailingComma:
-  # EnforcedStyleForMultiline: comma
-  Enabled: false
-
 Metrics/CyclomaticComplexity:
   Enabled: false
 
diff --git a/Gemfile b/Gemfile
index 7051e25..69bef0f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,6 +7,6 @@ group :development, :test do
   gem "rake", "~> 10.4"
   gem "rspec", "~> 3.0"
   gem "rspec-mocks", "~> 3.0"
-  gem "rubocop", "~> 0.24"
+  gem "rubocop", "~> 0.36"
   gem "rubygems-tasks", "~> 0.2"
 end
diff --git a/lib/lowered/expectations.rb b/lib/lowered/expectations.rb
index e071928..cf7c16f 100644
--- a/lib/lowered/expectations.rb
+++ b/lib/lowered/expectations.rb
@@ -5,7 +5,7 @@
 require 'pty'
 
 class LoweredExpectations
-  VERSION = '1.0.0'
+  VERSION = '1.0.1'.freeze
 
   class VersionPatternError < StandardError
   end
@@ -54,7 +54,7 @@ def self.run!(*args, quiet: false)
         while !r.eof?
           c = r.getc
           stdout << c
-          $stdout.write "#{c}"
+          $stdout.write c.to_s
         end
         Process.wait(pid)
       end
diff --git a/spec/integration/lowered/expectations_integration_spec.rb b/spec/integration/lowered/expectations_integration_spec.rb
index 54c3741..97332ad 100644
--- a/spec/integration/lowered/expectations_integration_spec.rb
+++ b/spec/integration/lowered/expectations_integration_spec.rb
@@ -19,7 +19,7 @@
 
   describe '.which' do
     it 'returns true when the executable is on the PATH' do
-      expect(LoweredExpectations.which tool).to be_truthy
+      expect(LoweredExpectations.which(tool)).to be_truthy
     end
 
     it 'raises an error when the executable is not on the PATH' do
diff --git a/spec/lowered/expectations_spec.rb b/spec/lowered/expectations_spec.rb
index 6588a7c..45405a5 100644
--- a/spec/lowered/expectations_spec.rb
+++ b/spec/lowered/expectations_spec.rb
@@ -44,7 +44,7 @@
 
   describe '.which' do
     it 'returns true when the executable is on the PATH' do
-      expect(LoweredExpectations.which tool).to be_truthy
+      expect(LoweredExpectations.which(tool)).to be_truthy
     end
 
     it 'raises an error when the executable is not on the PATH' do
@@ -54,12 +54,12 @@
 
   describe '.verify_version' do
     it 'returns true when the version string matches the version pattern' do
-      expect(LoweredExpectations.verify_version version, '~> 0.1').to        be_truthy
-      expect(LoweredExpectations.verify_version version, '~> 0').to          be_truthy
-      expect(LoweredExpectations.verify_version version, '> 0.1.1').to       be_truthy
-      expect(LoweredExpectations.verify_version version, '< 1').to           be_truthy
-      expect(LoweredExpectations.verify_version version, '> 0').to           be_truthy
-      expect(LoweredExpectations.verify_version version, "= #{version}").to  be_truthy
+      expect(LoweredExpectations.verify_version(version, '~> 0.1')).to        be_truthy
+      expect(LoweredExpectations.verify_version(version, '~> 0')).to          be_truthy
+      expect(LoweredExpectations.verify_version(version, '> 0.1.1')).to       be_truthy
+      expect(LoweredExpectations.verify_version(version, '< 1')).to           be_truthy
+      expect(LoweredExpectations.verify_version(version, '> 0')).to           be_truthy
+      expect(LoweredExpectations.verify_version(version, "= #{version}")).to  be_truthy
     end
 
     it 'raise an error when the version string does not match the version pattern' do