README.md in inline_svg-1.7.1 vs README.md in inline_svg-1.7.2

- old
+ new

@@ -96,10 +96,11 @@
 `desc`                  | add a \<desc\> node inside the top level of the SVG document
 `nocomment`             | remove comment tags from the SVG document
 `preserve_aspect_ratio` | adds a `preserveAspectRatio` attribute to the SVG
 `aria`                  | adds common accessibility attributes to the SVG (see [PR #34](https://github.com/jamesmartin/inline_svg/pull/34#issue-152062674) for details)
 `aria_hidden`           | adds the `aria-hidden=true` attribute to the SVG
+`fallback`              | set fallback SVG document
 
 Example:
 
 ```ruby
 inline_svg_tag(
@@ -111,10 +112,11 @@
   title: 'Some Title',
   desc: 'Some description',
   nocomment: true,
   preserve_aspect_ratio: 'xMaxYMax meet',
   aria: true,
-  aria_hidden: true
+  aria_hidden: true,
+  fallback: 'fallback-document.svg'
 )
 ```
 
 ## Accessibility
 