diff --git a/Gemfile b/Gemfile
index 2283ebe..42f51f3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -23,6 +23,6 @@ group :development do
   gem 'rubocop',          '~> 0.54', require: false
   gem 'rubocop-rspec',    '~> 1.23', require: false
   gem 'simplecov',        '~> 0.16', require: false
-  gem "rexical",           '~> 1.0', require: false
-  gem "racc",              '~> 1.4', require: false
+  gem 'rexical',           '~> 1.0', require: false
+  gem 'racc',              '~> 1.4', require: false
 end