diff --git a/config.sample.json b/config.sample.json
index 0033b17eba..acca45aaf8 100644
--- a/config.sample.json
+++ b/config.sample.json
@@ -22,7 +22,7 @@
         "https://scalar-staging.vector.im/api",
         "https://scalar-staging.riot.im/scalar/api"
     ],
-    "default_widget_height": "280px",
+    "default_widget_height": 280,
     "default_country_code": "GB",
     "show_labs_settings": false,
     "features": {},