diff --git a/src/services/exporter.ts b/src/services/exporter.ts
index a1fe347..e35bbb3 100644
--- a/src/services/exporter.ts
+++ b/src/services/exporter.ts
@@ -129,15 +129,15 @@ export class Exporter {
   }
 
   private _validateQueries(queries: DashboardQuery[]) {
-    if(!queries || !Array.isArray(queries)) {
+    if(!_.isArray(queries)) {
       throw new Error('`queries` field is required and should be an array');
     }
 
     for(const query of queries) {
-      if(!_.isEmpty(query.datasource)) {
+      if(_.isEmpty(query.datasource)) {
         throw new Error('all queries should have a `datasource` field');
       }
-      if(!_.isEmpty(query.panel.targets)) {
+      if(_.isEmpty(query.panel.targets)) {
         throw new Error('all queries should have a `panel` field with non-empty `targets` field');
       }
     }