diff --git a/Gemfile.lock b/Gemfile.lock
index c63f9ef..562d2e8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,8 +6,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     byebug (11.0.1)
     concurrent-ruby (1.1.5)
     crack (0.4.3)
@@ -17,7 +17,7 @@ GEM
     i18n (1.6.0)
       concurrent-ruby (~> 1.0)
     minitest (5.11.3)
-    public_suffix (3.1.1)
+    public_suffix (5.0.0)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)
       rspec-expectations (~> 3.8.0)