diff --git a/homeassistant/components/frontend/__init__.py b/homeassistant/components/frontend/__init__.py
index 20369503f5c..0529fd6dbb2 100644
--- a/homeassistant/components/frontend/__init__.py
+++ b/homeassistant/components/frontend/__init__.py
@@ -62,7 +62,7 @@ MANIFEST_JSON = {
     "screenshots": [
         {
             "src": "/static/images/screenshots/screenshot-1.png",
-            "sizes": "413×792",
+            "sizes": "413x792",
             "type": "image/png",
         }
     ],