diff --git a/Gemfile.lock b/Gemfile.lock
index 9f233e1..b1ac8ea 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,8 +6,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     ansi (1.5.0)
     builder (3.2.4)
     concurrent-ruby (1.1.7)
@@ -65,7 +65,7 @@ GEM
       multi_xml (~> 0.5)
       rack (>= 1.2, < 3)
     psych (2.2.4)
-    public_suffix (4.0.5)
+    public_suffix (5.0.0)
     rack (2.2.3)
     rake (13.0.1)
     rchardet (1.8.0)