diff --git a/Gemfile.lock b/Gemfile.lock
index 9ed6bbaa..c44d7fae 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -32,8 +32,8 @@ GEM
   remote: https://rubygems.org/
   specs:
     CFPropertyList (2.3.6)
-    addressable (2.6.0)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     builder (3.2.3)
     childprocess (0.6.3)
       ffi (~> 1.0, >= 1.0.11)
@@ -260,7 +260,7 @@ GEM
     nori (2.6.0)
     optimist (3.0.0)
     os (1.0.1)
-    public_suffix (3.1.1)
+    public_suffix (5.0.0)
     rake (10.5.0)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)