diff --git a/Gemfile.lock b/Gemfile.lock
index 1ae8866..9b7d488 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,8 +7,8 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
     docile (1.3.1)
@@ -32,7 +32,7 @@ GEM
       multi_json (~> 1.3)
       multi_xml (~> 0.5)
       rack (>= 1.2, < 3)
-    public_suffix (3.0.3)
+    public_suffix (5.0.0)
     rack (2.0.6)
     rake (10.5.0)
     safe_yaml (1.0.5)