diff --git a/lib/cff/index.rb b/lib/cff/index.rb
index b44d682..2875e9d 100644
--- a/lib/cff/index.rb
+++ b/lib/cff/index.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-# Copyright (c) 2018-2022 The Ruby Citation File Format Developers.
+# Copyright (c) 2018-2024 The Ruby Citation File Format Developers.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -22,6 +22,7 @@
 require_relative 'person'
 require_relative 'reference'
 require_relative 'schema'
+require_relative 'schemas'
 require_relative 'validatable'
 require_relative 'citable'
 
@@ -83,7 +84,7 @@ def initialize(param)
         @fields = build_index(param)
       else
         @fields = {}
-        @fields['cff-version'] = DEFAULT_SPEC_VERSION
+        @fields['cff-version'] = Schemas::DEFAULT_VERSION
         @fields['message'] = DEFAULT_MESSAGE
         @fields['title'] = param
       end
diff --git a/lib/cff/schemas.rb b/lib/cff/schemas.rb
index a9bd799..9f74c5f 100644
--- a/lib/cff/schemas.rb
+++ b/lib/cff/schemas.rb
@@ -20,9 +20,15 @@
 module CFF
   module Schemas # :nodoc:
     PATH = ::File.join(__dir__, 'schemas')
+
     FILES = Dir.glob(::File.join(PATH, '*.json')).to_h do |file|
       [::File.basename(file, '.json'), JSON.parse(::File.read(file))]
     end.freeze
+
     VERSIONS = FILES.keys.freeze
+
+    DEFAULT_VERSION = '1.2.0'
+
+    MIN_VALIDATABLE_VERSION = '1.2.0'
   end
 end
diff --git a/lib/cff/util.rb b/lib/cff/util.rb
index 4eeec4f..a5b12ff 100644
--- a/lib/cff/util.rb
+++ b/lib/cff/util.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-# Copyright (c) 2018-2022 The Ruby Citation File Format Developers.
+# Copyright (c) 2018-2024 The Ruby Citation File Format Developers.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -16,7 +16,7 @@
 
 require_relative 'entity'
 require_relative 'person'
-require_relative 'version'
+require_relative 'schemas'
 
 require 'rubygems'
 
@@ -33,8 +33,8 @@ module Util
     def update_cff_version(version)
       return '' if version.nil? || version.empty?
 
-      if Gem::Version.new(version) < Gem::Version.new(MIN_VALIDATABLE_VERSION)
-        MIN_VALIDATABLE_VERSION
+      if Gem::Version.new(version) < Gem::Version.new(Schemas::MIN_VALIDATABLE_VERSION)
+        Schemas::MIN_VALIDATABLE_VERSION
       else
         version
       end
diff --git a/lib/cff/version.rb b/lib/cff/version.rb
index 2e40f17..c74f58a 100644
--- a/lib/cff/version.rb
+++ b/lib/cff/version.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-# Copyright (c) 2018-2022 The Ruby Citation File Format Developers.
+# Copyright (c) 2018-2024 The Ruby Citation File Format Developers.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -16,8 +16,5 @@
 
 ##
 module CFF
-  # :nodoc:
-  VERSION = '2.0.0'
-  DEFAULT_SPEC_VERSION = '1.2.0'
-  MIN_VALIDATABLE_VERSION = '1.2.0'
+  VERSION = '2.0.0' # :nodoc:
 end
diff --git a/test/cff_test.rb b/test/cff_test.rb
index 2bdbc9b..570ad88 100644
--- a/test/cff_test.rb
+++ b/test/cff_test.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-# Copyright (c) 2018-2022 The Ruby Citation File Format Developers.
+# Copyright (c) 2018-2024 The Ruby Citation File Format Developers.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -22,8 +22,4 @@ class CFFTest < Minitest::Test
   def test_that_it_has_a_version_number
     refute_nil ::CFF::VERSION
   end
-
-  def test_that_it_has_a_spec_version_number
-    refute_nil ::CFF::DEFAULT_SPEC_VERSION
-  end
 end
diff --git a/test/file_test.rb b/test/file_test.rb
index 82b48f5..874ee6d 100644
--- a/test/file_test.rb
+++ b/test/file_test.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-# Copyright (c) 2018-2022 The Ruby Citation File Format Developers.
+# Copyright (c) 2018-2024 The Ruby Citation File Format Developers.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -41,7 +41,7 @@ def test_new_file_from_model
     index = ::CFF::Index.new(title)
     file = ::CFF::File.new('', index)
 
-    assert_equal(::CFF::DEFAULT_SPEC_VERSION, file.cff_version)
+    assert_equal(::CFF::Schemas::DEFAULT_VERSION, file.cff_version)
     assert_equal(title, file.title)
   end
 
@@ -49,7 +49,7 @@ def test_new_file_from_title
     title = 'software'
     file = ::CFF::File.new('', title)
 
-    assert_equal(::CFF::DEFAULT_SPEC_VERSION, file.cff_version)
+    assert_equal(::CFF::Schemas::DEFAULT_VERSION, file.cff_version)
     assert_equal(title, file.title)
   end
 
@@ -131,7 +131,7 @@ def test_read_short_cff_file
     end
 
     # `cff-version` will be updated to a validatable version.
-    assert_equal(::CFF::MIN_VALIDATABLE_VERSION, cff.cff_version)
+    assert_equal(::CFF::Schemas::MIN_VALIDATABLE_VERSION, cff.cff_version)
 
     assert_equal(1, cff.authors.length)
     person = cff.authors[0]
diff --git a/test/index_test.rb b/test/index_test.rb
index f0d9d27..23a3740 100644
--- a/test/index_test.rb
+++ b/test/index_test.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-# Copyright (c) 2018-2022 The Ruby Citation File Format Developers.
+# Copyright (c) 2018-2024 The Ruby Citation File Format Developers.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -36,7 +36,7 @@ def test_bad_methods_not_allowed
   end
 
   def test_default_index_cff_version
-    assert_equal(::CFF::DEFAULT_SPEC_VERSION, ::CFF::Index.new('').cff_version)
+    assert_equal(::CFF::Schemas::DEFAULT_VERSION, ::CFF::Index.new('').cff_version)
   end
 
   def test_cff_version_is_output_correctly
diff --git a/test/util_test.rb b/test/util_test.rb
index 55b62fc..4b75ff3 100644
--- a/test/util_test.rb
+++ b/test/util_test.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-# Copyright (c) 2018-2022 The Ruby Citation File Format Developers.
+# Copyright (c) 2018-2024 The Ruby Citation File Format Developers.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -23,8 +23,8 @@ class CFFUtilTest < Minitest::Test
 
   def test_update_cff_version
     assert_equal('', update_cff_version(''))
-    assert_equal(::CFF::MIN_VALIDATABLE_VERSION, update_cff_version('1.0.3'))
-    assert_equal(::CFF::MIN_VALIDATABLE_VERSION, update_cff_version('1.1.0'))
+    assert_equal(::CFF::Schemas::MIN_VALIDATABLE_VERSION, update_cff_version('1.0.3'))
+    assert_equal(::CFF::Schemas::MIN_VALIDATABLE_VERSION, update_cff_version('1.1.0'))
     assert_equal('1.2.0', update_cff_version('1.2.0'))
     assert_equal('1.2.1', update_cff_version('1.2.1'))
   end