diff --git a/Gemfile.lock b/Gemfile.lock
index 783ee09..276a77d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,7 +10,8 @@ PATH
 GEM
   remote: http://rubygems.org/
   specs:
-    addressable (2.3.2)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     byebug (3.1.2)
       columnize (~> 0.8)
       debugger-linecache (~> 1.2)
@@ -45,6 +46,7 @@ GEM
     multi_json (1.3.6)
     multi_xml (0.5.5)
     nokogiri (1.5.5)
+    public_suffix (5.0.0)
     rack (1.4.1)
     rack-test (0.6.1)
       rack (>= 1.0)