diff --git a/Gemfile.lock b/Gemfile.lock
index 9f97776..f183439 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,8 +13,8 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.1)
-      public_suffix (~> 2.0, >= 2.0.2)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     coderay (1.1.1)
     concurrent-ruby (1.0.4)
     crack (0.4.3)
@@ -41,7 +41,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    public_suffix (2.0.5)
+    public_suffix (3.1.1)
     rack (2.0.6)
     rack-protection (2.0.2)
       rack