diff --git a/Gemfile.lock b/Gemfile.lock
index ed1d93e..a637515 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     archive-tar-minitar (0.8)
       minitar (~> 0.8)
       minitar-cli (~> 0.8)
@@ -44,7 +44,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.0.3)
+    public_suffix (5.0.0)
     rack (2.0.6)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)