diff --git a/Gemfile b/Gemfile
index 4ace63b7b..e7672bbe5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,7 +8,7 @@ redmine_version_major = version_file.match(/MAJOR =/).post_match.match(/\d/)[0].
 
 gem "holidays", "~>1.0.3"
 gem "icalendar"
-gem "nokogiri", ">= 1.6.7.2"
+gem "nokogiri", "~>1.6.8"
 gem "open-uri-cached"
 gem "prawn"
 gem 'json'