diff --git a/public/app/plugins/datasource/elasticsearch/datasource.ts b/public/app/plugins/datasource/elasticsearch/datasource.ts
index 2ade99dba9a..b4984f93d87 100644
--- a/public/app/plugins/datasource/elasticsearch/datasource.ts
+++ b/public/app/plugins/datasource/elasticsearch/datasource.ts
@@ -831,7 +831,7 @@ export class ElasticDatasource
     return false;
   }
 
-  private isPrimitive(obj: undefined | null | string | number | boolean | unknown) {
+  private isPrimitive(obj: unknown) {
     if (obj === null || obj === undefined) {
       return true;
     }