diff --git a/Gemfile.lock b/Gemfile.lock
index 1fe6279..9802985 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -67,8 +67,8 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.1)
-      public_suffix (~> 2.0, >= 2.0.2)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     arbre (1.1.1)
       activesupport (>= 3.0.0)
     arel (7.1.4)
@@ -199,7 +199,7 @@ GEM
       slop (~> 3.4)
     pry-rails (0.3.6)
       pry (>= 0.10.4)
-    public_suffix (2.0.5)
+    public_suffix (4.0.6)
     puma (3.8.2)
     rack (2.0.1)
     rack-cors (0.4.1)