diff --git a/lib/n65/opcodes.rb b/lib/n65/opcodes.rb
index 238f331..e1bb7c5 100644
--- a/lib/n65/opcodes.rb
+++ b/lib/n65/opcodes.rb
@@ -1,9 +1,7 @@
+# frozen_string_literal: true
+
 require 'yaml'
 
 module N65
-
-  ##  Load OpCode definitions into this module
-  MyDirectory = File.expand_path(File.dirname(__FILE__))
-  OpCodes = YAML.load_file("#{MyDirectory}/../../data/opcodes.yaml")
-
+  OpCodes = YAML.load_file(File.join(__dir__, '../../data/opcodes.yaml'))
 end