diff --git a/Gemfile.lock b/Gemfile.lock
index 4e3b37f..5bcd7ce 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     backports (3.11.3)
     colorator (1.1.0)
     concurrent-ruby (1.1.4)
@@ -62,7 +62,7 @@ GEM
     multi_json (1.13.1)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (3.0.3)
+    public_suffix (4.0.6)
     rack (1.6.12)
     rack-protection (1.5.5)
       rack