diff --git a/Gemfile.lock b/Gemfile.lock
index e76b8b0..f8e8a3e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,8 +6,8 @@ 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)
     ansi (1.5.0)
     autoprefixer-rails (9.8.6.5)
       execjs
@@ -141,7 +141,7 @@ GEM
     prmd (0.12.0)
       erubis (~> 2.7)
       json_schema (~> 0.3, >= 0.3.1)
-    public_suffix (4.0.6)
+    public_suffix (5.0.0)
     racc (1.6.0)
     rack (2.2.3)
     rack-livereload (0.3.17)