diff --git a/Gemfile.lock b/Gemfile.lock
index 0ab8042..c7f57dc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,8 +7,8 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.2)
-      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)
     domain_name (0.5.20180417)
@@ -22,7 +22,7 @@ GEM
     minitest (5.11.3)
     minitest-stub-const (0.6)
     netrc (0.11.0)
-    public_suffix (3.0.3)
+    public_suffix (4.0.6)
     rake (10.5.0)
     rest-client (2.0.2)
       http-cookie (>= 1.0.2, < 2.0)