diff --git a/Gemfile.lock b/Gemfile.lock
index 2ad72f7..f1ad5dd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.0)
-      public_suffix (~> 2.0, >= 2.0.2)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     builder (3.2.2)
     descendants_tracker (0.0.4)
       thread_safe (~> 0.3, >= 0.3.1)
@@ -45,7 +45,7 @@ GEM
       multi_xml (~> 0.5)
       rack (>= 1.2, < 3)
     power_assert (0.3.1)
-    public_suffix (2.0.4)
+    public_suffix (5.0.0)
     rack (2.0.7)
     rake (11.3.0)
     rdoc (4.2.2)