diff --git a/spec/dummy/Gemfile.lock b/spec/dummy/Gemfile.lock
index 4fe32805..73b2fb15 100644
--- a/spec/dummy/Gemfile.lock
+++ b/spec/dummy/Gemfile.lock
@@ -35,7 +35,8 @@ GEM
     activesupport (3.2.22)
       i18n (~> 0.6, >= 0.6.4)
       multi_json (~> 1.0)
-    addressable (2.3.8)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     arel (3.0.3)
     aws_cf_signer (0.1.3)
     builder (3.0.4)
@@ -132,6 +133,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
+    public_suffix (4.0.6)
     rack (1.4.7)
     rack-cache (1.2)
       rack (>= 0.4)