diff --git a/lib/github_changelog_generator/task.rb b/lib/github_changelog_generator/task.rb
index d7fbf11..1e43a40 100644
--- a/lib/github_changelog_generator/task.rb
+++ b/lib/github_changelog_generator/task.rb
@@ -16,7 +16,7 @@ module GitHubChangelogGenerator
                   bug_labels enhancement_labels
                   between_tags exclude_tags since_tag max_issues
                   github_site github_endpoint simple_list
-                  future_release verbose )
+                  future_release verbose release_url )
 
     OPTIONS.each do |o|
       attr_accessor o.to_sym