diff --git a/Gemfile.lock b/Gemfile.lock
index 528a83d1..b9b1f4ed 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -36,7 +36,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.4.0)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     arel (6.0.3)
     aws-sdk (2.6.23)
       aws-sdk-resources (= 2.6.23)
@@ -151,6 +152,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
+    public_suffix (4.0.7)
     puma (3.4.0)
     rack (1.6.4)
     rack-cache (1.6.1)