diff --git a/Gemfile.lock b/Gemfile.lock
index 1db3332..8a1237c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -14,8 +14,8 @@ 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)
     ast (2.4.0)
     byebug (10.0.0)
     concurrent-ruby (1.0.5)
@@ -37,7 +37,7 @@ GEM
     parser (2.5.0.3)
       ast (~> 2.4.0)
     powerpack (0.1.1)
-    public_suffix (3.0.2)
+    public_suffix (5.0.0)
     rainbow (3.0.0)
     rake (10.5.0)
     rspec (3.7.0)