diff --git a/Gemfile.lock b/Gemfile.lock
index 85d012f7..1e104e0b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -30,8 +30,8 @@ GEM
     activesupport (3.2.22)
       i18n (~> 0.6, >= 0.6.4)
       multi_json (~> 1.0)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     airbrussh (1.3.1)
       sshkit (>= 1.6.1, != 1.7.0)
     ansi (1.5.0)
@@ -222,7 +222,7 @@ GEM
     pdfkit (0.8.2)
     polyglot (0.3.5)
     power_assert (1.1.3)
-    public_suffix (3.0.3)
+    public_suffix (5.0.0)
     rack (1.4.7)
     rack-cache (1.8.0)
       rack (>= 0.4)