diff --git a/Gemfile.lock b/Gemfile.lock
index 346d355..e9c2c8c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,8 +8,8 @@ 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)
     ast (2.4.0)
     coderay (1.1.2)
     crack (0.4.3)
@@ -29,7 +29,7 @@ GEM
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.0.3)
+    public_suffix (4.0.6)
     rainbow (3.0.0)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)