diff --git a/LICENSE b/LICENSE
index 49e336f..9f30726 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2020 Reinier de Lange
+Copyright (c) 2021 Reinier de Lange
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
diff --git a/VERSION b/VERSION
deleted file mode 100644
index 56fea8a..0000000
--- a/VERSION
+++ /dev/null
@@ -1 +0,0 @@
-3.0.0
\ No newline at end of file
diff --git a/deep_cloneable.gemspec b/deep_cloneable.gemspec
index 397ace3..a7d7c3b 100644
--- a/deep_cloneable.gemspec
+++ b/deep_cloneable.gemspec
@@ -2,74 +2,16 @@
 
 Gem::Specification.new do |s|
   s.name = 'deep_cloneable'
-  s.version = '3.0.0'
-
-  s.required_rubygems_version = Gem::Requirement.new('>= 0') if s.respond_to? :required_rubygems_version=
-  s.require_paths = ['lib']
+  s.version = DeepCloneable::Version
   s.authors = ['Reinier de Lange']
-  s.date = '2020-11-27'
   s.description = 'Extends the functionality of ActiveRecord::Base#dup to perform a deep clone that includes user specified associations. '
   s.email = 'rjdelange@icloud.com'
-  s.extra_rdoc_files = [
-    'LICENSE'
-  ]
-  s.files = [
-    '.document',
-    '.rubocop.yml',
-    '.travis.yml',
-    'Appraisals',
-    'CHANGELOG.md',
-    'Gemfile',
-    'Gemfile.lock',
-    'LICENSE',
-    'Rakefile',
-    'VERSION',
-    'deep_cloneable.gemspec',
-    'gemfiles/3.1.gemfile',
-    'gemfiles/3.1.gemfile.lock',
-    'gemfiles/3.2.gemfile',
-    'gemfiles/3.2.gemfile.lock',
-    'gemfiles/4.0.gemfile',
-    'gemfiles/4.0.gemfile.lock',
-    'gemfiles/4.1.gemfile',
-    'gemfiles/4.1.gemfile.lock',
-    'gemfiles/4.2.gemfile',
-    'gemfiles/4.2.gemfile.lock',
-    'gemfiles/5.0.gemfile',
-    'gemfiles/5.0.gemfile.lock',
-    'gemfiles/5.1.gemfile',
-    'gemfiles/5.1.gemfile.lock',
-    'gemfiles/5.2.gemfile',
-    'gemfiles/5.2.gemfile.lock',
-    'gemfiles/6.0.gemfile',
-    'gemfiles/6.0.gemfile.lock',
-    'init.rb',
-    'lib/deep_cloneable.rb',
-    'lib/deep_cloneable/association_not_found_exception.rb',
-    'lib/deep_cloneable/deep_clone.rb',
-    'lib/deep_cloneable/skip_validations.rb',
-    'readme.md',
-    'test/database.yml',
-    'test/models.rb',
-    'test/schema.rb',
-    'test/test_deep_cloneable.rb',
-    'test/test_helper.rb'
-  ]
+  s.extra_rdoc_files = ['LICENSE']
+  s.files = Dir.glob('{bin/*,lib/**/*,[A-Z]*}')
   s.homepage = 'https://github.com/moiristo/deep_cloneable'
   s.licenses = ['MIT']
+  s.platform = Gem::Platform::RUBY
   s.required_ruby_version = '>= 1.9.3'
-  s.rubygems_version = '3.0.2'
-  s.summary = 'This gem gives every ActiveRecord::Base object the possibility to do a deep clone.'
-
-  if s.respond_to? :specification_version
-    s.specification_version = 4
-
-    if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0')
-      s.add_runtime_dependency('activerecord', ['>= 3.1.0', '< 7'])
-    else
-      s.add_dependency('activerecord', ['>= 3.1.0', '< 7'])
-    end
-  else
-    s.add_dependency('activerecord', ['>= 3.1.0', '< 7'])
-  end
+  s.require_paths = ['lib']
+  s.add_runtime_dependency('activerecord', ['>= 3.1.0', '< 7'])
 end
diff --git a/lib/deep_cloneable/version.rb b/lib/deep_cloneable/version.rb
new file mode 100644
index 0000000..2feec6a
--- /dev/null
+++ b/lib/deep_cloneable/version.rb
@@ -0,0 +1,3 @@
+module DeepCloneable
+  VERSION = '3.0.0'
+end
diff --git a/readme.md b/readme.md
index 0664d35..c504a07 100644
--- a/readme.md
+++ b/readme.md
@@ -240,4 +240,4 @@ pirate.deep_clone include: [:parrot, :rum], skip_missing_associations: true
 
 ### Copyright
 
-Copyright &copy; 2020 Reinier de Lange. See LICENSE for details.
+Copyright &copy; 2021 Reinier de Lange. See LICENSE for details.