diff --git a/Gemfile.lock b/Gemfile.lock
index 2899fa5..956aebf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -50,8 +50,8 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     arbre (1.1.1)
       activesupport (>= 3.0.0)
     arel (8.0.0)
@@ -141,7 +141,7 @@ GEM
     orm_adapter (0.5.0)
     polyamorous (1.3.3)
       activerecord (>= 3.0)
-    public_suffix (3.0.2)
+    public_suffix (4.0.6)
     puma (3.11.3)
     rack (2.0.4)
     rack-test (0.8.3)