diff --git a/Gemfile.lock b/Gemfile.lock
index c00da56..2ebaff1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -15,7 +15,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     backports (3.6.4)
     chronic (0.10.2)
     coderay (1.1.0)
@@ -42,6 +43,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
+    public_suffix (4.0.6)
     rack (1.6.0)
     rack-protection (1.5.3)
       rack