diff --git a/Gemfile.lock b/Gemfile.lock
index 65d9bc3..f4aa869 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.1)
-      public_suffix (~> 2.0, >= 2.0.2)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     ast (2.3.0)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
@@ -12,7 +12,7 @@ GEM
     parser (2.4.0.0)
       ast (~> 2.2)
     powerpack (0.1.1)
-    public_suffix (2.0.5)
+    public_suffix (4.0.6)
     rainbow (2.2.2)
       rake
     rake (12.0.0)