diff --git a/Gemfile.lock b/Gemfile.lock
index b9da03d..ab32275 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -15,8 +15,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.6.0)
-      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)
     concurrent-ruby (1.1.5)
@@ -38,7 +38,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     psych (3.1.0)
-    public_suffix (3.0.3)
+    public_suffix (4.0.6)
     rainbow (3.0.0)
     rake (12.3.2)
     rubocop (0.67.2)