diff --git a/Gemfile.lock b/Gemfile.lock
index 4b1c606..8bcb41b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -25,8 +25,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     aruba (0.14.5)
       childprocess (>= 0.6.3, < 0.10.0)
       contracts (~> 0.9)
@@ -108,7 +108,7 @@ GEM
     pry-byebug (3.6.0)
       byebug (~> 10.0)
       pry (~> 0.10)
-    public_suffix (3.0.2)
+    public_suffix (5.0.0)
     rake (12.3.1)
     redcarpet (3.4.0)
     rspec (3.7.0)