diff --git a/.rubocop.yml b/.rubocop.yml
index 6037b5c..b3598f6 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -2,6 +2,7 @@ AllCops:
   TargetRubyVersion: 2.4
   Exclude:
     - 'bin/**/*'
+    - 'Guardfile'
 
 inherit_mode:
   merge:
diff --git a/README.md b/README.md
index ce88b12..d0d738d 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ Proof of concept type-checking library for Ruby 2.6. Works with previous version
 class A
   using Typerb
 
-  def strong_type_call(some_arg)
+  def call(some_arg)
     some_arg.type!(String, Symbol)
   end
 
@@ -26,7 +26,7 @@ A.new.call_with_respond_checks(1) #=> TypeError: 'Integer should respond to all
 This is equivalent to:
 ```ruby
 class A
-  def strong_type_call(some_arg)
+  def call(some_arg)
     raise TypeError, "`some_arg` should be String or Symbol, not #{some_arg.class}" unless [String, Symbol].include?(some_arg.class)
   end
 
diff --git a/lib/typerb.rb b/lib/typerb.rb
index b5a0e29..5d82b68 100644
--- a/lib/typerb.rb
+++ b/lib/typerb.rb
@@ -41,6 +41,5 @@ def respond_to!(*methods)
       exception.set_backtrace(caller)
       raise exception
     end
-
   end
 end
diff --git a/spec/typerb_spec.rb b/spec/typerb_spec.rb
index 4b79ac0..0db9ddb 100644
--- a/spec/typerb_spec.rb
+++ b/spec/typerb_spec.rb
@@ -166,7 +166,7 @@ def initialize(arg1, arg2)
     expect(kls.new(1, '1').arg2).to eq '1'
   end
 
-  context "respond_to!" do
+  context 'respond_to!' do
     it 'raises TypeError if object does not respond to specified method' do
       kls = Class.new do
         using Typerb
@@ -177,7 +177,7 @@ def initialize(arg)
         end
       end
       expect { kls.new(123) }.to raise_error(TypeError, 'Integer should respond to all methods: strip')
-      expect { kls.new("foo") }.not_to raise_error
+      expect { kls.new('foo') }.not_to raise_error
     end
 
     it 'raises TypeError if object does not respond to specified methods' do
@@ -190,11 +190,7 @@ def initialize(arg)
         end
       end
       expect { kls.new(123) }.to raise_error(TypeError, 'Integer should respond to all methods: strip, downcase, chars')
-      expect { kls.new("foo") }.not_to raise_error
+      expect { kls.new('foo') }.not_to raise_error
     end
-
-
-
   end
-
 end
diff --git a/typerb.gemspec b/typerb.gemspec
index 193eee6..b1ca6c1 100644
--- a/typerb.gemspec
+++ b/typerb.gemspec
@@ -25,13 +25,13 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['lib']
 
   spec.add_development_dependency 'bundler', '>= 1.17'
+  spec.add_development_dependency 'guard'
+  spec.add_development_dependency 'guard-rspec'
   spec.add_development_dependency 'pry'
   spec.add_development_dependency 'rake', '>= 10.0'
   spec.add_development_dependency 'rspec', '>= 3.0'
   spec.add_development_dependency 'rubocop'
   spec.add_development_dependency 'super_awesome_print'
-  spec.add_development_dependency 'guard'
-  spec.add_development_dependency 'guard-rspec'
 
   spec.required_ruby_version = '>= 2.4'
 end