diff --git a/contents.json b/contents.json
index 1b49acaa..94384ced 100644
--- a/contents.json
+++ b/contents.json
@@ -3570,6 +3570,13 @@
       "tags": [
         "archive"
       ]
+    },
+    {
+      "title": "Closebox",
+      "description": "Find the Closest Postbox",
+      "category": "location",
+      "source": "https://github.com/peteog/Closebox",
+      "itunes": "https://itunes.apple.com/gb/app/closebox-find-closest-postbox/id556364813"
     }
   ]
 }