diff --git a/layouts/_default/app.html b/layouts/_default/app.html
index 8f559eb..b2b47f0 100644
--- a/layouts/_default/app.html
+++ b/layouts/_default/app.html
@@ -216,7 +216,7 @@ along with this program. If not, see .
"image": "{{ .Params.HeaderImage }}",
- "operatingSystem": "linux",
+ "operatingSystem": "{{ delimit $AppData.platforms ", " }}",
"offers": {
"price": 0.00,
"priceCurrency": "EUR"