diff --git a/README b/README.md
similarity index 93%
rename from README
rename to README.md
index f9aa634..2f0c07a 100644
--- a/README
+++ b/README.md
@@ -15,7 +15,7 @@ in index.php
     RewriteBase /
 in .htaccess
 
-    mail('shikiryu [at] gmail.com', ...);
+    mail('email', ...);
 in FileToZipEmail.php
 
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