diff --git a/lib/exceptions.rb b/lib/exceptions.rb
index 4204dae..74d3c51 100644
--- a/lib/exceptions.rb
+++ b/lib/exceptions.rb
@@ -1,9 +1,16 @@
-class PastebinnerError < StandardError
- 
-  def ArgumentError
+module PastebinnerError 
+
+  class ArgumentError < StandardError
+  	def message
+		"Invalid argument"
+		end
   end
 
-  def ConfigError
+  class ConfigError < StandardError
+		def message
+		"Invalid configuration"
+		end
   end
 
 end
+