diff --git a/Gemfile b/Gemfile
index d2d957656..267f7b43c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -32,7 +32,7 @@ gem 'rails-settings-cached',     '0.4.1' # for settings
 
 # html-xml
 gem 'haml-rails', '0.9.0' # haml for views
-gem 'nokogiri', '1.7.1' # For XML parsing
+gem 'nokogiri', '~> 1.7'
 
 # style
 gem 'bootstrap-sass', '3.3.5.1' # bootstrap style
diff --git a/Gemfile.lock b/Gemfile.lock
index 3a1954029..f1e98d929 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -284,7 +284,7 @@ GEM
     multi_json (1.12.1)
     multi_xml (0.6.0)
     netrc (0.11.0)
-    nokogiri (1.7.1)
+    nokogiri (1.7.2)
       mini_portile2 (~> 2.1.0)
     nori (2.6.0)
     nprogress-rails (0.1.6.7)
@@ -537,7 +537,7 @@ DEPENDENCIES
   liquid (= 3.0.6)
   mina (= 0.3.1)
   money-rails
-  nokogiri (= 1.7.1)
+  nokogiri (~> 1.7)
   nprogress-rails (= 0.1.6.7)
   paper_trail!
   pdfkit (= 0.6.2)