diff --git a/Gemfile.lock b/Gemfile.lock
index c264a72..d1b0dcd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.3.6)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     backports (3.6.1)
     capistrano (2.15.5)
       highline
@@ -64,6 +65,7 @@ GEM
       multi_json (~> 1.3)
       multi_xml (~> 0.5)
       rack (~> 1.2)
+    public_suffix (4.0.6)
     rack (1.5.2)
     rack-protection (1.5.3)
       rack