diff --git a/Gemfile.lock b/Gemfile.lock
index 6fc3628..0934c33 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,8 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     colorator (1.1.0)
     coveralls (0.8.21)
       json (>= 1.8, < 3)
@@ -56,7 +56,7 @@ GEM
       mini_portile2 (~> 2.3.0)
     pathutil (0.16.1)
       forwardable-extended (~> 2.6)
-    public_suffix (3.0.1)
+    public_suffix (5.0.0)
     rake (12.3.0)
     rb-fsevent (0.10.2)
     rb-inotify (0.9.10)