diff --git a/Gemfile.lock b/Gemfile.lock
index d912a4a..930f1d0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.7.0)
-      public_suffix (>= 2.0.2, < 5.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     colorator (1.1.0)
     ffi (1.11.3)
     forwardable-extended (2.6.0)
@@ -31,7 +31,7 @@ GEM
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     posix-spawn (0.3.13)
-    public_suffix (4.0.1)
+    public_suffix (5.0.0)
     pygments.rb (0.6.3)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.2.0)