diff --git a/Gemfile.lock b/Gemfile.lock
index 4c79c75..2c32376 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -39,8 +39,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     amoeba (3.1.0)
       activerecord (>= 3.2.6)
     ansi (1.5.0)
@@ -331,7 +331,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.1.1)
+    public_suffix (5.0.0)
     puma (3.12.4)
     rack (2.2.2)
     rack-proxy (0.6.5)