diff --git a/Gemfile.lock b/Gemfile.lock
index 2dcebb3..e5ab5ae 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -35,8 +35,8 @@ GEM
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     backports (3.11.4)
     builder (3.2.3)
     charlock_holmes (0.7.7)
@@ -87,7 +87,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    public_suffix (3.0.3)
+    public_suffix (4.0.6)
     rack (2.0.6)
     rack-protection (2.0.4)
       rack