diff --git a/QuickOSM/core/query_factory.py b/QuickOSM/core/query_factory.py
index 42510dc0..ca5494fb 100644
--- a/QuickOSM/core/query_factory.py
+++ b/QuickOSM/core/query_factory.py
@@ -161,11 +161,11 @@ def _check_parameters(self) -> bool:
 
         :raise QueryFactoryException:
         """
-        if type(self._query_type) != QueryType:
+        if not isinstance(self._query_type, QueryType):
             raise QueryFactoryException(tr('Wrong query type.'))
 
         for osmObject in self._osm_objects:
-            if type(osmObject) != OsmType:
+            if not isinstance(osmObject, OsmType):
                 raise QueryFactoryException(tr('Wrong OSM object.'))
 
         if self._query_type == QueryType.AroundArea:
diff --git a/QuickOSM/core/utilities/json_encoder.py b/QuickOSM/core/utilities/json_encoder.py
index 308b0665..6a8a30cf 100644
--- a/QuickOSM/core/utilities/json_encoder.py
+++ b/QuickOSM/core/utilities/json_encoder.py
@@ -16,9 +16,9 @@ class EnumEncoder(json.JSONEncoder):
     """Override the json encoder to serialize enum."""
     def default(self, obj):
         """Function of serialization."""
-        if type(obj) in [LayerType, Format, MultiType]:
+        if isinstance(obj, (LayerType, Format, MultiType)):
             return {"__enum__": str(obj)}
-        if type(obj) == QgsRectangle:
+        if isinstance(obj, QgsRectangle):
             extent = [
                 str(obj.xMinimum()), str(obj.yMinimum()),
                 str(obj.xMaximum()), str(obj.yMaximum())