diff --git a/README.md b/README.md
index 37efa47..7b0bb7a 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,11 @@ To install, use the following command:
 Usage
 -----
 
+To include functions to active record, you need a rails initializer:
+
+    require 'active_record'
+    ActiveRecord::Base.send :include, Axlsx::Ar
+
 ###Examples
 
 See the Guides here: 
diff --git a/lib/acts_as_xlsx/ar.rb b/lib/acts_as_xlsx/ar.rb
index 595bd56..a52c164 100644
--- a/lib/acts_as_xlsx/ar.rb
+++ b/lib/acts_as_xlsx/ar.rb
@@ -92,9 +92,4 @@ def to_xlsx(options = {})
       end
     end
   end
-end
-
-require 'active_record'
-ActiveRecord::Base.send :include, Axlsx::Ar
-
-
+end
\ No newline at end of file