diff --git a/Gemfile.lock b/Gemfile.lock
index 9b89349..02aed19 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,8 +38,8 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.0)
-      public_suffix (~> 2.0, >= 2.0.2)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     arel (7.1.4)
     builder (3.2.2)
     concurrent-ruby (1.1.5)
@@ -103,7 +103,7 @@ GEM
       multi_xml (~> 0.5)
       rack (>= 1.2, < 3)
     psych (2.2.1)
-    public_suffix (2.0.4)
+    public_suffix (5.0.0)
     rack (2.0.7)
     rack-test (0.6.3)
       rack (>= 1.0)