diff --git a/Gemfile.lock b/Gemfile.lock
index 07f6a37..90395a0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.0)
-      public_suffix (~> 2.0, >= 2.0.2)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     builder (3.2.2)
     chef (12.16.42)
       addressable
@@ -101,7 +101,7 @@ GEM
       wmi-lite (~> 1.0)
     plist (3.2.0)
     proxifier (1.0.3)
-    public_suffix (2.0.4)
+    public_suffix (4.0.6)
     rack (2.0.8)
     rspec (3.5.0)
       rspec-core (~> 3.5.0)