diff --git a/Gemfile.lock b/Gemfile.lock
index 34c53f7..ad31dee 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,8 +8,8 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     coderay (1.1.2)
     concurrent-ruby (1.1.4)
     domain_name (0.5.20180417)
@@ -54,7 +54,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.0.3)
+    public_suffix (5.0.0)
     rake (10.5.0)
     unf (0.1.4)
       unf_ext