diff --git a/server/Gemfile.lock b/server/Gemfile.lock
index 433d5c7..3f91224 100644
--- a/server/Gemfile.lock
+++ b/server/Gemfile.lock
@@ -12,7 +12,8 @@ GEM
     activesupport (3.2.8)
       i18n (~> 0.6)
       multi_json (~> 1.0)
-    addressable (2.3.2)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     arel (3.0.2)
     async-rack (0.5.1)
       rack (~> 1.1)
@@ -62,6 +63,7 @@ GEM
       coderay (~> 1.0.5)
       method_source (~> 0.8)
       slop (~> 3.3.1)
+    public_suffix (5.0.0)
     rack (1.4.4)
     rack-accept (0.4.5)
       rack (>= 0.4)