diff --git a/.rubocop.yml b/.rubocop.yml
index 099cb76..02cb8ff 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -37,4 +37,5 @@ Layout/EndAlignment:
   EnforcedStyleAlignWith: variable
 
 Metrics/BlockLength:
-  Max: 37
+  AllowedMethods:
+  - namespace
diff --git a/Rakefile b/Rakefile
index eb45a33..aa1be20 100644
--- a/Rakefile
+++ b/Rakefile
@@ -9,7 +9,6 @@ require 'net/http'
 require_relative 'config/config'
 require_relative 'lib/package'
 require_relative 'lib/download'
-require_relative 'lib/dmd_tools'
 
 task :dmd, [:version] do |_, arguments|
   raise 'Version is not specified.' unless arguments.key? :version
diff --git a/lib/dmd_tools.rb b/rakelib/dmd_tools.rake
similarity index 99%
rename from lib/dmd_tools.rb
rename to rakelib/dmd_tools.rake
index 124fbaa..3d98063 100644
--- a/lib/dmd_tools.rb
+++ b/rakelib/dmd_tools.rake
@@ -5,7 +5,7 @@
 # frozen_string_literal: true
 
 require 'rake'
-require_relative 'download'
+require_relative '../lib/download'
 
 module SlackBuilder
   module DmdTools