diff --git a/Gemfile.lock b/Gemfile.lock
index 563d1b81..e168db70 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -43,7 +43,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.3.8)
+    addressable (2.8.0)
+      public_suffix (>= 2.0.2, < 5.0)
     arel (6.0.3)
     aws_cf_signer (0.1.3)
     bson (3.1.2)
@@ -142,6 +143,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
+    public_suffix (4.0.6)
     rack (1.6.4)
     rack-test (0.6.3)
       rack (>= 1.0)