diff --git a/Gemfile.lock b/Gemfile.lock
index 9cec4b06..2f394ab1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,8 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    addressable (2.5.1)
-      public_suffix (~> 2.0, >= 2.0.2)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     backports (3.10.3)
     colorator (1.1.0)
     em-websocket (0.5.1)
@@ -51,7 +51,7 @@ GEM
     multi_json (1.12.2)
     pathutil (0.14.0)
       forwardable-extended (~> 2.6)
-    public_suffix (2.0.5)
+    public_suffix (5.0.0)
     rack (1.6.8)
     rack-protection (1.5.3)
       rack