diff --git a/README.md b/README.md
index 33f3e80..2eaec57 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,7 @@ gulp.task('sass:watch', function () {
 
 ## Options
 
-Pass in options just like you would for [`node-sass`](https://github.com/sass/node-sass#options); they will be passed along just as if you were using `node-sass`.
+Pass in options just like you would for [`node-sass`](https://github.com/sass/node-sass#options); they will be passed along just as if you were using `node-sass`. Except for the `data` option which is used by gulp-sass internally. Using the `file` option is also unsupported and results in undefined behaviour that may change without notice.  
 
 For example: