diff --git a/bin/wayback_machine_downloader b/bin/wayback_machine_downloader
index 6a55313..81ec752 100755
--- a/bin/wayback_machine_downloader
+++ b/bin/wayback_machine_downloader
@@ -38,7 +38,7 @@ option_parser = OptionParser.new do |opts|
     options[:list] = true
   end
 
-  opts.on("--threads NUMBER", Integer, "Number of threads to use while downloading website (ie. 20)") do |t|
+  opts.on("-c", "--concurrency NUMBER", Integer, "Number of multiple files to dowload at a time. Default is one file at a time. (ie. 20)") do |t|
     options[:threads_count] = t
   end