diff --git a/index.php b/index.php
index 913a2ea..1080284 100644
--- a/index.php
+++ b/index.php
@@ -18,7 +18,7 @@
 				$path = $path . '.md';
 				if (file_exists($path))
 				{
-					$zip->addFile($path, basename($path));
+					$zip->addFile($path, str_replace(' ', '-', basename($path)));
 				}
 			}
 		}