ETag can not be parsed

[theowenyoung]

error: Uncaught (in promise) SyntaxError: Unexpected token 'W', "W/"aebf5bd"... is not valid JSON
etag: JSON.parse(res.headers.get("etag")!),
^
at JSON.parse ()
at S3Bucket.getObject (https://deno.land/x/s3@0.5.0/src/bucket.ts:238:18)