diff --git a/lib/github_changelog_generator/task.rb b/lib/github_changelog_generator/task.rb
index 1e43a40..7ce2ecf 100644
--- a/lib/github_changelog_generator/task.rb
+++ b/lib/github_changelog_generator/task.rb
@@ -51,7 +51,7 @@ module GitHubChangelogGenerator
 
         OPTIONS.each do |o|
           v = instance_variable_get("@#{o}")
-          options[o.to_sym] = v if v
+          options[o.to_sym] = v unless v.nil?
         end
 
         generator = Generator.new options