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@@ -1,22 +1,31 @@
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-class Hash
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-
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-  def stringify_keys
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-    inject({}) do |options, (key, value)|
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-      options[key.to_s] = value
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-      options
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-    end
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-  end
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+module Waves
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+  module Utilities # :nodoc:
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+    
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+    # Utility methods mixed into Hash.
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+    module Hash
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+      
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+      # Return a copy of the hash where all keys have been converted to strings.
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+      def stringify_keys
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+        inject({}) do |options, (key, value)|
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+          options[key.to_s] = value
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+          options
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+        end
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+      end
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-  # Destructively convert all keys to symbols.
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-  def symbolize_keys!
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-    keys.each do |key|
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-      unless key.is_a?(Symbol)
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-        self[key.to_sym] = self[key]
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-        delete(key)
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+      # Destructively convert all keys to symbols.
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+      def symbolize_keys!
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+        keys.each do |key|
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+          unless key.is_a?(Symbol)
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+            self[key.to_sym] = self[key]
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+            delete(key)
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+          end
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+        end
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+        self
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       end
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     end
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-    self
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   end
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+end
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-
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+class Hash # :nodoc:
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+  include Waves::Utilities::Hash
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 end
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\ No newline at end of file