diff --git a/docs/Gemfile b/docs/Gemfile
old mode 100755
new mode 100644
index e515a326e45..43e8ff37573
--- a/docs/Gemfile
+++ b/docs/Gemfile
@@ -5,4 +5,4 @@ gem 'jekyll', '2.0.3'
 gem 'jekyll-sitemap', '0.4.1'
 gem 'jekyll-assets'
 gem 'github-markdown'
-gem 'html-pipeline'
+gem 'html-pipeline', '>= 3.0.0'