diff --git a/docs/tags/image.md b/docs/tags/image.md
index 8895187..4648391 100644
--- a/docs/tags/image.md
+++ b/docs/tags/image.md
@@ -17,7 +17,7 @@ Multiple
 - `width` (recommended): The width of the asset in pixels.
 - `height` (optional): The height of the asset in pixels.
 - `type` (optional): Mime type of the media such as image/jpeg or video/mp4.
-- `purpose` (optional): An unordered set of case-insensative, space-separated tokens following the equivalent [W3C syntax](https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#space-separated-tokens). This value should not exceed 128 characters. This allows podcasters to indicate the suggested uses of this media.
+- `purpose` (optional): An unordered set of case-insensitive, space-separated tokens following the equivalent [W3C syntax](https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#space-separated-tokens). This value should not exceed 128 characters. This allows podcasters to indicate the suggested uses of this media.
 
 ### Notes
 The only required attribute is `href`, specifying the url of the asset being delivered.  If no further attributes are defined, such as `aspect-ratio` or `purpose`, the image is assumed to be square (1:1).  For accessibility, `alt` is also encouraged.