diff --git a/Gemfile.lock b/Gemfile.lock
index 70d06d4..372c7db 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,7 +38,8 @@ GEM
       tzinfo (~> 1.1)
     acts-as-taggable-on (3.5.0)
       activerecord (>= 3.2, < 5)
-    addressable (2.3.8)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     ansi (1.5.0)
     arel (6.0.4)
     autoprefixer-rails (5.1.10)
@@ -198,6 +199,7 @@ GEM
       slop (~> 3.4)
     pry-rails (0.3.4)
       pry (>= 0.9.10)
+    public_suffix (4.0.7)
     puma (3.12.4)
     rack (1.6.13)
     rack-pjax (1.1.0)