diff --git a/Gemfile.lock b/Gemfile.lock
index 6a8b2754..b933d48a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,8 +13,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     backports (3.18.2)
     borrower (0.10.0)
     coffee-script (2.4.1)
@@ -118,7 +118,7 @@ GEM
       activesupport (>= 3.1)
     pandoc-ruby (2.1.4)
     parallel (1.20.0)
-    public_suffix (4.0.6)
+    public_suffix (5.0.0)
     rack (2.2.3)
     rack-livereload (0.3.17)
       rack