diff --git a/Gemfile.lock b/Gemfile.lock
index 4d9a8d4..f561c65 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,13 +7,15 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.3.8)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     crack (0.4.2)
       safe_yaml (~> 1.0.0)
     diff-lcs (1.2.5)
     ethon (0.11.0)
       ffi (>= 1.3.0)
     ffi (1.9.25)
+    public_suffix (5.0.0)
     rake (10.1.0)
     rspec (3.2.0)
       rspec-core (~> 3.2.0)