diff --git a/Gemfile.lock b/Gemfile.lock
index 4c248da3..e0d6418f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -29,8 +29,8 @@ GEM
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     adsf (1.4.1)
       rack (>= 1.0.0, < 3.0.0)
     ast (2.4.0)
@@ -208,7 +208,7 @@ GEM
     pry (0.11.3)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.0.2)
+    public_suffix (5.0.0)
     pygments.rb (1.2.1)
       multi_json (>= 1.0.0)
     rack (2.0.4)