diff --git a/projects/ngx-open-map-wrapper/src/lib/adapters/map-adapter.interface.ts b/projects/ngx-open-map-wrapper/src/lib/adapters/map-adapter.interface.ts
index b11a57c..d2f08ca 100644
--- a/projects/ngx-open-map-wrapper/src/lib/adapters/map-adapter.interface.ts
+++ b/projects/ngx-open-map-wrapper/src/lib/adapters/map-adapter.interface.ts
@@ -9,7 +9,7 @@ export interface GeoPoint {
   y: number;
 }
 export interface Zone {
-  id: string;
+  id: number;
   name?: string;
   color?: string;
   opacity?: number;