diff --git a/Gemfile b/Gemfile
old mode 100755
new mode 100644
index dae5e50..08ec6ea
--- a/Gemfile
+++ b/Gemfile
@@ -8,4 +8,4 @@ gem 'middleman-autoprefixer', '~> 2.7.0'
 gem "middleman-sprockets", "~> 4.1.0"
 gem 'rouge', '~> 2.0.5'
 gem 'redcarpet', '~> 3.4.0'
-gem 'nokogiri', '~> 1.6.8'
+gem 'nokogiri', '~> 1.15.7'