diff --git a/Gemfile b/Gemfile
index cda1728a..ed4ef174 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ source 'https://rubygems.org'
 gemspec
 
 gem "pry"
-gem "racc", "1.8.0"
+gem "racc", "1.8.1"
 gem "rake"
 gem "rspec"
 gem "simplecov", require: false
diff --git a/lib/lrama/parser.rb b/lib/lrama/parser.rb
index 2d0a8ce7..c536581f 100644
--- a/lib/lrama/parser.rb
+++ b/lib/lrama/parser.rb
@@ -1,6 +1,6 @@
 #
 # DO NOT MODIFY!!!!
-# This file is automatically generated by Racc 1.8.0
+# This file is automatically generated by Racc 1.8.1
 # from Racc grammar file "parser.y".
 #
 
@@ -23,7 +23,7 @@
 $".push "#{__dir__}/racc/info.rb"
 
 module Racc
-  VERSION   = '1.8.0'
+  VERSION   = '1.8.1'
   Version = VERSION
   Copyright = 'Copyright (c) 1999-2006 Minero Aoki'
 end
@@ -38,7 +38,7 @@ class ParseError < StandardError; end
   ParseError = Racc::ParseError # :nodoc:
 end
 
-# Racc is a LALR(1) parser generator.
+# Racc is an LALR(1) parser generator.
 # It is written in Ruby itself, and generates Ruby programs.
 #
 # == Command-line Reference