diff --git a/Gemfile.lock b/Gemfile.lock
index 0dc1362..c62a0f1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,8 +6,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    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)
     concurrent-ruby (1.0.5)
     crack (0.4.3)
@@ -21,7 +21,7 @@ GEM
     parser (2.5.1.0)
       ast (~> 2.4.0)
     powerpack (0.1.1)
-    public_suffix (3.0.2)
+    public_suffix (4.0.6)
     rainbow (3.0.0)
     rspec (3.7.0)
       rspec-core (~> 3.7.0)