diff --git a/Gemfile.lock b/Gemfile.lock
index 249abd4..6f1e6d9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,8 +1,8 @@
 GEM
   remote: http://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)
     daemons (1.2.6)
     date (1.0.0)
     em-websocket (0.3.8)
@@ -19,7 +19,7 @@ GEM
     nokogiri (1.10.8)
       mini_portile2 (~> 2.4.0)
     oj (3.7.0)
-    public_suffix (3.0.3)
+    public_suffix (4.0.7)
     rack (2.1.4)
     rack-protection (2.0.4)
       rack