diff --git a/serendipity_event_markdown/PHP Markdown Extra Readme.text b/serendipity_event_markdown/PHP_Markdown_Extra_Readme.txt
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rename from serendipity_event_markdown/PHP Markdown Extra Readme.text
rename to serendipity_event_markdown/PHP_Markdown_Extra_Readme.txt
diff --git a/serendipity_event_markdown/PHP Markdown Readme.text b/serendipity_event_markdown/PHP_Markdown_Readme.txt
similarity index 100%
rename from serendipity_event_markdown/PHP Markdown Readme.text
rename to serendipity_event_markdown/PHP_Markdown_Readme.txt