diff --git a/Gemfile.lock b/Gemfile.lock
index 9878bef..4ce178c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -69,8 +69,8 @@ GEM
       tzinfo (~> 1.1)
     acts-as-taggable-on (3.5.0)
       activerecord (>= 3.2, < 5)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     ansi (1.5.0)
     arbre (1.1.1)
       activesupport (>= 3.0.0)
@@ -322,7 +322,7 @@ GEM
       activerecord (>= 3.0)
       i18n (>= 0.5.0)
       railties (>= 3.0.0)
-    public_suffix (3.0.3)
+    public_suffix (5.0.0)
     quiet_assets (1.1.0)
       railties (>= 3.1, < 5.0)
     rack (1.6.12)