diff --git a/Gemfile.lock b/Gemfile.lock
index f5b8942f..2ab7c483 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -159,7 +159,7 @@ GEM
       hashery (~> 2.0)
       ruby-rc4
       ttfunk
-    public_suffix (5.0.3)
+    public_suffix (5.0.4)
     racc (1.7.1)
     rack (2.2.7)
     rack-livereload (0.3.17)