diff --git a/Gemfile.lock b/Gemfile.lock
index 72f99e5..2e20032 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -24,8 +24,8 @@ 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)
     buftok (0.2.0)
     concurrent-ruby (1.0.5)
     domain_name (0.5.20180417)
@@ -52,7 +52,7 @@ GEM
     minitest (5.11.3)
     multipart-post (2.0.0)
     naught (1.1.0)
-    public_suffix (3.0.3)
+    public_suffix (5.0.0)
     redis (4.0.2)
     redis-namespace (1.6.0)
       redis (>= 3.0.4)