diff --git a/Gemfile.lock b/Gemfile.lock
index 0decab1..a36cf4d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,8 +6,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     ast (2.4.0)
     axiom-types (0.1.1)
       descendants_tracker (~> 0.0.4)
@@ -55,7 +55,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     psych (3.1.0)
-    public_suffix (3.1.1)
+    public_suffix (5.0.0)
     rainbow (3.0.0)
     reek (5.4.0)
       codeclimate-engine-rb (~> 0.4.0)