diff --git a/.rubocop.yml b/.rubocop.yml
index 365ca05..0d4f3c6 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -41,6 +41,9 @@ Style/BlockDelimiters:
 Style/BracesAroundHashParameters:
   Enabled: true
 
+Style/Encoding:
+  Enabled: true
+
 Style/EmptyMethod:
   Enabled: true
 
diff --git a/rack-attack.gemspec b/rack-attack.gemspec
index bbee3e0..98eb88d 100644
--- a/rack-attack.gemspec
+++ b/rack-attack.gemspec
@@ -1,4 +1,3 @@
-# -*- encoding: utf-8 -*-
 # frozen_string_literal: true
 
 lib = File.expand_path('../lib/', __FILE__)