diff --git a/Gemfile b/Gemfile
index 5397b72..e69335e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
 source 'https://rubygems.org'
 
-gem 'nokogiri', '1.6.7.2'
+gem 'nokogiri', '1.13.9'
 gem 'rails', '4.1.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index e48fff7..9ca92f0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -37,11 +37,13 @@ GEM
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
     mime-types (1.25.1)
-    mini_portile2 (2.0.0)
+    mini_portile2 (2.8.0)
     minitest (5.9.0)
-    nokogiri (1.6.7.2)
-      mini_portile2 (~> 2.0.0.rc2)
+    nokogiri (1.13.9)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
     polyglot (0.3.5)
+    racc (1.6.0)
     rack (1.5.5)
     rack-test (0.6.3)
       rack (>= 1.0)
@@ -80,7 +82,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  nokogiri (= 1.6.7.2)
+  nokogiri (= 1.13.9)
   rails (= 4.1.0)
 
 BUNDLED WITH