diff --git a/Gemfile.lock b/Gemfile.lock
index badcbcf..3e6d74d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -54,8 +54,8 @@ 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 (1.1.1)
       activesupport (>= 3.0.0)
     archive-zip (0.12.0)
@@ -189,7 +189,7 @@ GEM
       omniauth (~> 1.2)
     orm_adapter (0.5.0)
     pg (1.1.4)
-    public_suffix (3.0.3)
+    public_suffix (4.0.6)
     puma (3.12.1)
     rack (2.0.6)
     rack-proxy (0.6.5)