lib/hash_ext/normalized.rb in hash_ext-0.4.0 vs lib/hash_ext/normalized.rb in hash_ext-0.5.0

@@ -1,7 +1,9 @@
 class Hash
   class Normalized < Hash
 
+    include DeepFreezable
+
     def self.subclass(&block)
       Class.new(self) do
         define_method :initialize do |hash={}|
           super hash, &block
         end
\ No newline at end of file