diff --git a/Gemfile.lock b/Gemfile.lock
index c9ad3c4..9ce5fea 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -63,8 +63,8 @@ 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)
     ansi (1.5.0)
     arbre (1.2.1)
       activesupport (>= 3.0.0)
@@ -281,7 +281,7 @@ GEM
     path_expander (1.0.2)
     pg (0.21.0)
     powerpack (0.1.1)
-    public_suffix (3.0.0)
+    public_suffix (4.0.6)
     puma (3.10.0)
     pundit (1.1.0)
       activesupport (>= 3.0.0)