diff --git a/lib/PHPExcel/Chart/Renderer/PHP Charting Libraries.txt b/lib/PHPExcel/Chart/Renderer/PHP_Charting_Libraries.txt
similarity index 100%
rename from lib/PHPExcel/Chart/Renderer/PHP Charting Libraries.txt
rename to lib/PHPExcel/Chart/Renderer/PHP_Charting_Libraries.txt