diff --git a/Gemfile b/Gemfile
index d90599b9b..3507dff6a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -22,7 +22,7 @@ end
 group :test, :development do
   gem 'classifier-reborn', github: 'jekyll/classifier-reborn'
   gem 'github-pages-health-check'
-  #gem 'gsl', github: 'SciRuby/rb-gsl'
+  # gem 'gsl', github: 'SciRuby/rb-gsl'
   gem 'html-proofer'
   gem 'nokogiri'
   gem 'pry'