diff --git a/README.md b/README.md
index c5103d3..bdb42eb 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,7 @@ You can easily set the locale used for i18n in a before-filter:
 
 ```ruby
 class SomeController < ApplicationController
-  before_filter :set_locale
+  before_action :set_locale
 
   private
     def set_locale
diff --git a/lib/http_accept_language/auto_locale.rb b/lib/http_accept_language/auto_locale.rb
index ce6a991..37aab50 100644
--- a/lib/http_accept_language/auto_locale.rb
+++ b/lib/http_accept_language/auto_locale.rb
@@ -5,7 +5,7 @@ module AutoLocale
     extend ActiveSupport::Concern
 
     included do
-      before_filter :set_locale
+      before_action :set_locale
     end
 
     private
diff --git a/spec/auto_locale_spec.rb b/spec/auto_locale_spec.rb
index c8bead2..23af640 100644
--- a/spec/auto_locale_spec.rb
+++ b/spec/auto_locale_spec.rb
@@ -11,7 +11,7 @@ def initialize(header = nil)
         @header = header
       end
 
-      def self.before_filter(dummy)
+      def self.before_action(dummy)
         # dummy method
       end