diff --git a/Gemfile.lock b/Gemfile.lock
index 606d684..49d5796 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -49,8 +49,8 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.1)
-      public_suffix (~> 2.0, >= 2.0.2)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     archive-zip (0.7.0)
       io-like (~> 0.3.0)
     arel (8.0.0)
@@ -129,7 +129,7 @@ GEM
     polyamorous (1.3.1)
       activerecord (>= 3.0)
     powerpack (0.1.1)
-    public_suffix (2.0.5)
+    public_suffix (4.0.6)
     puma (3.9.1)
     rack (2.0.3)
     rack-protection (2.0.0)