diff --git a/Gemfile.lock b/Gemfile.lock
index 9ffac4b1..922cc459 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -35,7 +35,8 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.3.8)
+    addressable (2.8.1)
+      public_suffix (>= 2.0.2, < 6.0)
     arel (6.0.4)
     ast (2.3.0)
     bcrypt (3.1.12)
@@ -209,6 +210,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
+    public_suffix (5.0.0)
     racc (1.5.2)
     rack (1.6.13)
     rack-protection (1.5.3)