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 <https://www.gnu.org/licenses/>.
             
             
             "image": "{{ .Params.HeaderImage }}",
-            "operatingSystem": "linux",
+            "operatingSystem": "{{ delimit $AppData.platforms ", " }}",
             "offers": {
                 "price": 0.00,
                 "priceCurrency": "EUR"