README.md in simple_model-1.2.12 vs README.md in simple_model-1.2.13

- old
+ new

@@ -8,10 +8,10 @@
 * ActiveModel::Conversion
 * ActiveModel::Validations::Callbacks
 * ActiveModel::Dirty
 * ActiveModel::Naming
 * ActiveModel::Callbacks
-* ActiveSupport core extentions (see [SimpleModel::Base](https://github.com/JoshMcKin/simple_model/blob/master/lib/simple_model/base.rb))
+* ActiveSupport core extensions (see [SimpleModel::Base](https://github.com/JoshMcKin/simple_model/blob/master/lib/simple_model/base.rb))
 
 Additionally SimpleModel implements basic model actions
 
 ## Installation
 