diff --git a/server/src/lib/Transformer/Transformer.ts b/server/src/lib/Transformer/Transformer.ts
index 891c1f80a..d9a34beb2 100644
--- a/server/src/lib/Transformer/Transformer.ts
+++ b/server/src/lib/Transformer/Transformer.ts
@@ -31,7 +31,7 @@ export class Transformer {
     const attributes = this.getIncludeAttributesTransformed(item);
 
     return {
-      ...!isUndefined(item.toJSON) ? item.toObject() : item,
+      ...!isUndefined(item.toObject) ? item.toObject() : item,
       ...attributes
     };
   };
diff --git a/server/src/models/Model.js b/server/src/models/Model.js
index 084b4dde4..4383d57f5 100644
--- a/server/src/models/Model.js
+++ b/server/src/models/Model.js
@@ -49,7 +49,7 @@ export default class ModelBase extends mixin(Model, [DateSession]) {
   }
 
   toObject(opt) {
-    const parsedJson = super.$formatJson(this, opt);
+    const parsedJson = super.$toJson(opt);
     return parsedJson;
   }
 }