diff --git a/Gemfile.lock b/Gemfile.lock
index 3a790d7..8b8f16c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -64,7 +64,8 @@ GEM
       tzinfo (~> 1.1)
     acts-as-taggable-on (3.5.0)
       activerecord (>= 3.2, < 5)
-    addressable (2.4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     arel (6.0.3)
     autoparse (0.3.3)
       addressable (>= 2.3.1)
@@ -202,6 +203,7 @@ GEM
       railties (>= 3.2, < 5.0)
     polyamorous (1.2.0)
       activerecord (>= 3.0)
+    public_suffix (5.0.0)
     puma (3.2.0)
     rack (1.6.4)
     rack-contrib (1.4.0)