diff --git a/src/components/MapMaplibreGl.tsx b/src/components/MapMaplibreGl.tsx
index d05bd287..16135cb1 100644
--- a/src/components/MapMaplibreGl.tsx
+++ b/src/components/MapMaplibreGl.tsx
@@ -136,9 +136,8 @@ export default class MapMaplibreGl extends React.Component<MapMaplibreGlProps, M
       maxZoom: 24,
       // setting to always load glyphs of CJK fonts from server
       // https://maplibre.org/maplibre-gl-js/docs/examples/local-ideographs/
-      // typedef of MapLibreGl.MapOptions doesn't accept boolean but this follow the doc.
-      localIdeographFontFamily: false as any
-    }
+      localIdeographFontFamily: false
+    } satisfies MapOptions;
 
     const map = new MapLibreGl.Map(mapOpts);