diff --git a/lib/ronin/db/host_name.rb b/lib/ronin/db/host_name.rb
index 5f9a9753..72fa1397 100644
--- a/lib/ronin/db/host_name.rb
+++ b/lib/ronin/db/host_name.rb
@@ -100,6 +100,14 @@ class HostName < ActiveRecord::Base
       #   @return [Array<URL>]
       has_many :urls, class_name: 'URL'
 
+      # @!attribute [rw] vulnerabilities
+      #   The vulnerabilities which reference the host name.
+      #
+      #   @return [Array<Vulnerability>]
+      #
+      #   @since 0.2.0
+      has_many :vulnerabilities, dependent: :destroy
+
       #
       # Looks up the host name.
       #
@@ -222,3 +230,4 @@ def to_s
 
 require 'ronin/db/host_name_ip_address'
 require 'ronin/db/ip_address'
+require 'ronin/db/vulnerability'