diff --git a/install.json b/install.json
index 0d80b55..6c11a78 100644
--- a/install.json
+++ b/install.json
@@ -8,6 +8,17 @@
       "src": "https://fsh.plus/fsh.png",
       "sizes": "256x256",
       "type": "image/png"
+    },
+    {
+      "src": "https://fsh.plus/fsh-512.png",
+      "type": "image/png",
+      "sizes": "512x512"
+    },
+    {
+      "src": "https://fsh.plus/mask.png",
+      "sizes": "256x256",
+      "type": "image/png",
+      "purpose": "maskable"
     }
   ],
   "related_applications": [