diff --git a/kaminari-actionview/kaminari-actionview.gemspec b/kaminari-actionview/kaminari-actionview.gemspec
index f03db66..60c0fc6 100644
--- a/kaminari-actionview/kaminari-actionview.gemspec
+++ b/kaminari-actionview/kaminari-actionview.gemspec
@@ -1,4 +1,3 @@
-# coding: utf-8
 # frozen_string_literal: true
 lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
diff --git a/kaminari-activerecord/kaminari-activerecord.gemspec b/kaminari-activerecord/kaminari-activerecord.gemspec
index 81d7766..489f813 100644
--- a/kaminari-activerecord/kaminari-activerecord.gemspec
+++ b/kaminari-activerecord/kaminari-activerecord.gemspec
@@ -1,4 +1,3 @@
-# coding: utf-8
 # frozen_string_literal: true
 lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
diff --git a/kaminari-core/kaminari-core.gemspec b/kaminari-core/kaminari-core.gemspec
index 95ff92d..e10bea8 100644
--- a/kaminari-core/kaminari-core.gemspec
+++ b/kaminari-core/kaminari-core.gemspec
@@ -1,4 +1,3 @@
-# coding: utf-8
 # frozen_string_literal: true
 lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
diff --git a/kaminari.gemspec b/kaminari.gemspec
index 76e9a04..277aef6 100644
--- a/kaminari.gemspec
+++ b/kaminari.gemspec
@@ -1,4 +1,3 @@
-# -*- encoding: utf-8 -*-
 # frozen_string_literal: true
 $:.push File.expand_path("../lib", __FILE__)
 require "kaminari/version"