diff --git a/Gemfile.lock b/Gemfile.lock
index dc5dbdb..93e11a8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,8 +13,8 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     ast (2.4.0)
     colorize (0.8.1)
     crack (0.4.3)
@@ -31,7 +31,7 @@ GEM
       ast (~> 2.4.0)
     power_assert (1.1.3)
     powerpack (0.1.2)
-    public_suffix (3.0.3)
+    public_suffix (5.0.0)
     rainbow (2.2.2)
       rake
     rake (12.3.3)