diff --git a/Gemfile.lock b/Gemfile.lock
index 7f07d84..cb7809a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -55,8 +55,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     arbre (1.2.1)
       activesupport (>= 3.0.0)
     arel (8.0.0)
@@ -180,7 +180,7 @@ GEM
       method_source (~> 0.9.0)
     pry-rails (0.3.9)
       pry (>= 0.10.4)
-    public_suffix (3.0.3)
+    public_suffix (4.0.6)
     rack (2.0.7)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)