diff --git a/Gemfile.lock b/Gemfile.lock
index fb10d5d..acac52b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,7 +8,8 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     airbrussh (1.1.1)
       sshkit (>= 1.6.1, != 1.7.0)
     aws-sdk (2.6.6)
@@ -112,6 +113,7 @@ GEM
     newrelic_rpm (3.16.3.323)
     oauth (0.5.1)
     os (0.9.6)
+    public_suffix (5.0.0)
     rack (1.6.4)
     rack-protection (1.5.3)
       rack