diff --git a/Gemfile.lock b/Gemfile.lock
index 5dcb9dda..59f7f25a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,8 +6,8 @@ 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)
     colorator (1.1.0)
     concurrent-ruby (1.0.5)
     em-websocket (0.5.1)
@@ -82,7 +82,7 @@ GEM
       mini_portile2 (~> 2.3.0)
     pathutil (0.16.1)
       forwardable-extended (~> 2.6)
-    public_suffix (3.0.2)
+    public_suffix (5.0.0)
     pygments.rb (1.2.1)
       multi_json (>= 1.0.0)
     rack (2.0.4)