diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 1f9187d..53de8c0 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -30,8 +30,6 @@ Style/Documentation:
   Exclude:
     - 'spec/**/*'
     - 'test/**/*'
-    - 'lib/refine_tree.rb'
-    - 'lib/refine_tree/converter/prism.rb'
 
 # Offense count: 4
 # Configuration parameters: AllowedVariables.
diff --git a/lib/refine_tree.rb b/lib/refine_tree.rb
index 901c0e0..4ba0da1 100644
--- a/lib/refine_tree.rb
+++ b/lib/refine_tree.rb
@@ -3,6 +3,7 @@
 require_relative 'refine_tree/version'
 require_relative 'refine_tree/refine_tree'
 
+# Parse Ruby code with Ruby's Parser(Universal Parser)
 module RefineTree
   def self.parse(source)
     refine_tree_parse(source)