diff --git a/Gemfile.lock b/Gemfile.lock
index c696b43..fd66a9a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,13 +6,13 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
     diff-lcs (1.3)
     hashdiff (0.3.8)
-    public_suffix (3.0.3)
+    public_suffix (4.0.6)
     rake (10.5.0)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)