diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 716b086..c89fce3 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -33,11 +33,3 @@ Rails/RootPathnameMethods:
 Style/MixinUsage:
   Exclude:
     - 'Rakefile'
-
-# Offense count: 1
-# This cop supports unsafe autocorrection (--autocorrect-all).
-# Configuration parameters: EnforcedStyle, Autocorrect.
-# SupportedStyles: module_function, extend_self, forbidden
-Style/ModuleFunction:
-  Exclude:
-    - 'lib/page_title_helper.rb'
diff --git a/lib/page_title_helper.rb b/lib/page_title_helper.rb
index 55497ca..f476b20 100644
--- a/lib/page_title_helper.rb
+++ b/lib/page_title_helper.rb
@@ -14,7 +14,7 @@
 module PageTitleHelper
   # https://github.com/thoughtbot/paperclip/blob/master/lib/paperclip/interpolations.rb
   module Interpolations
-    extend self
+    module_function
 
     def self.interpolate(pattern, *args)
       instance_methods(false).sort.reverse.inject(pattern.to_s.dup) do |result, tag|