diff --git a/Gemfile.lock b/Gemfile.lock
index 13e6532..38a353c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,8 +7,8 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.1)
-      public_suffix (~> 2.0, >= 2.0.2)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     coderay (1.1.1)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
@@ -24,7 +24,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    public_suffix (2.0.5)
+    public_suffix (4.0.7)
     rake (13.0.1)
     rspec (3.6.0)
       rspec-core (~> 3.6.0)