diff --git a/Gemfile.lock b/Gemfile.lock
index 9848627..3897faa 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,8 +38,8 @@ GEM
       i18n (~> 0.7)
       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)
     arel (8.0.0)
     buftok (0.2.0)
     builder (3.2.4)
@@ -94,7 +94,7 @@ GEM
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
     pg (0.18.4)
-    public_suffix (4.0.6)
+    public_suffix (5.0.0)
     racc (1.5.2)
     rack (2.2.3)
     rack-test (1.1.0)