diff --git a/Gemfile.lock b/Gemfile.lock
index a0f53f5..1db5cad 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -10,8 +10,8 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     coderay (1.1.1)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
@@ -45,7 +45,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    public_suffix (3.0.3)
+    public_suffix (4.0.6)
     rake (12.3.3)
     rspec (3.6.0)
       rspec-core (~> 3.6.0)