diff --git a/plugins/Marketplace/PackageModel.py b/plugins/Marketplace/PackageModel.py
index 5f7b66b935..752016e12f 100644
--- a/plugins/Marketplace/PackageModel.py
+++ b/plugins/Marketplace/PackageModel.py
@@ -235,11 +235,11 @@ class PackageModel(QObject):
     def whereToBuy(self) -> str:
         return self._where_to_buy
 
-    @pyqtProperty("QVariantList", constant = True)
+    @pyqtProperty("QStringList", constant = True)
     def compatiblePrinters(self) -> List[str]:
         return self._compatible_printers
 
-    @pyqtProperty("QVariantList", constant = True)
+    @pyqtProperty("QStringList", constant = True)
     def compatibleSupportMaterials(self) -> List[str]:
         return self._compatible_support_materials