diff --git a/Gemfile.lock b/Gemfile.lock
index df2a29f..bc650f9 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)
     buftok (0.2.0)
     builder (3.2.2)
@@ -109,7 +109,7 @@ GEM
     nokogiri (1.6.8.1)
       mini_portile2 (~> 2.1.0)
     pg (0.18.4)
-    public_suffix (2.0.4)
+    public_suffix (5.0.0)
     puma (3.6.0)
     rack (2.0.1)
     rack-test (0.6.3)