diff --git a/src/SimpleXLSXGen.php b/src/SimpleXLSXGen.php
index a45f533..8181206 100644
--- a/src/SimpleXLSXGen.php
+++ b/src/SimpleXLSXGen.php
@@ -117,7 +117,7 @@ class SimpleXLSXGen {
 		return true;
 	}
 	public function download() {
-		return $this->downloadAs( gmdate('YmdHi.xlsx') );
+		return $this->downloadAs( gmdate('YmdHi') . '.xlsx' );
 	}
 	public function downloadAs( $filename ) {
 		$fh = fopen('php://memory','wb');
@@ -378,4 +378,4 @@ class SimpleXLSXGen {
 
 			return (float) $excelDate + $excelTime;
 		}
-}
\ No newline at end of file
+}