1 files changed, 2 insertions, 2 deletions
diff --git a/src/fields/NumberField.ts b/src/fields/NumberField.ts
index 45b920e31..7eea360c0 100644
--- a/src/fields/NumberField.ts
+++ b/src/fields/NumberField.ts
@@ -15,9 +15,9 @@ export class NumberField extends BasicField<number> {
         return new NumberField(this.Data);
     }
 
-    ToJson(): { _id: string, type: Types, data: number } {
+    ToJson() {
         return {
-            _id: this.Id,
+            id: this.Id,
             type: Types.Number,
             data: this.Data
         };