diff --git a/src/api/api.service.ts b/src/api/api.service.ts
index 2e34ed1..17c95c7 100644
--- a/src/api/api.service.ts
+++ b/src/api/api.service.ts
@@ -40,7 +40,7 @@ export default abstract class ApiService {
       Object.keys(queryParams).forEach(key => {
         const value = queryParams[key];
         if (value !== null && value !== undefined) {
-          if (typeof (value) === typeof (Array)) {
+          if (Array.isArray(value)) {
             (value as Array<any>).forEach(x => url.searchParams.append(key, x.toString()));
           } else
             url.searchParams.append(key, value.toString());