diff --git a/docs/Gemfile b/docs/Gemfile
old mode 100755
new mode 100644
index 81c8218..692833c
--- a/docs/Gemfile
+++ b/docs/Gemfile
@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-gem "github-pages", '163', group: :jekyll_plugins
+gem "github-pages", "164", group: :jekyll_plugins
 gem "nokogiri", ">= 1.12.5"
 gem "kramdown", ">= 2.3.0"
 gem "addressable", ">= 2.8.0"