diff --git a/mojxml_plugin/algorithm.py b/mojxml_plugin/algorithm.py
index 80952a0..4ef9a02 100644
--- a/mojxml_plugin/algorithm.py
+++ b/mojxml_plugin/algorithm.py
@@ -1,5 +1,6 @@
 from pathlib import Path
 
+from PyQt5.QtCore import QVariant
 from qgis.core import QgsProcessingException  # pyright: ignore
 from qgis.core import (
     QgsCoordinateReferenceSystem,
@@ -22,6 +23,12 @@
 from .mojxml.process.executor import ThreadPoolExecutor
 from .mojxml.schema import OGR_SCHEMA
 
+_OGR_QT_TYPE_MAP = {
+    "str": QVariant.String,
+    "int": QVariant.Int,
+    "float": QVariant.Double,
+}
+
 
 class MOJXMLProcessingAlrogithm(QgsProcessingAlgorithm):
     INPUT = "INPUT"
@@ -86,8 +93,8 @@ def processAlgorithm(self, parameters, context, feedback):
             )
 
         fields = QgsFields()
-        for name, type in OGR_SCHEMA["properties"].items():
-            fields.append(QgsField(name, typeName=type))
+        for name, ogr_type in OGR_SCHEMA["properties"].items():
+            fields.append(QgsField(name, type=_OGR_QT_TYPE_MAP[ogr_type]))
 
         include_chikugai = self.parameterAsBoolean(parameters, self.CHIKUGAI, context)
         include_arbitrary = self.parameterAsBoolean(parameters, self.ARBITRARY, context)