diff --git a/frontend/package.json b/frontend/package.json
index e698548..a8d92d3 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -27,6 +27,7 @@
 		"@sveltejs/kit": "^2.22.0",
 		"@sveltejs/vite-plugin-svelte": "^6.2.4",
 		"@tailwindcss/vite": "^4.2.0",
+		"@types/geojson": "^7946.0.16",
 		"@types/node": "^22.19.11",
 		"bits-ui": "^2.16.1",
 		"clsx": "^2.1.1",
diff --git a/frontend/tsconfig.json b/frontend/tsconfig.json
index a5567ee..d6208e2 100644
--- a/frontend/tsconfig.json
+++ b/frontend/tsconfig.json
@@ -9,7 +9,8 @@
 		"skipLibCheck": true,
 		"sourceMap": true,
 		"strict": true,
-		"moduleResolution": "bundler"
+		"moduleResolution": "bundler",
+		"types": ["geojson"]
 	}
 	// Path aliases are handled by https://svelte.dev/docs/kit/configuration#alias
 	// except $lib which is handled by https://svelte.dev/docs/kit/configuration#files