diff --git a/CHANGELOG.md b/CHANGELOG.md
index 14bd059..4178e2b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+### Changed
+
+- chore: zero-argument `super()` everywhere and PEP 604 unions in `isinstance` checks, now that Python 3.10 is the minimum (#302) - Sena Köse
+
 ### Fixed
 
 - model: escape single quotes in `Edm.String` literals, so filters on values containing an apostrophe produce a valid OData query - Francois Pilet
diff --git a/pyodata/exceptions.py b/pyodata/exceptions.py
index 9d7c387..4f84094 100644
--- a/pyodata/exceptions.py
+++ b/pyodata/exceptions.py
@@ -32,7 +32,7 @@ def __new__(cls, message, response):
         return super(HttpError, cls).__new__(cls, message, response)
 
     def __init__(self, message, response):
-        super(HttpError, self).__init__(message)
+        super().__init__(message)
 
         self.response = response
 
diff --git a/pyodata/v2/model.py b/pyodata/v2/model.py
index 0470ed3..9d6b912 100644
--- a/pyodata/v2/model.py
+++ b/pyodata/v2/model.py
@@ -150,7 +150,7 @@ def retain_null(self):
 
 class Identifier:
     def __init__(self, name):
-        super(Identifier, self).__init__()
+        super().__init__()
 
         self._name = name
 
@@ -347,7 +347,7 @@ class EdmPrefixedTypTraits(TypTraits):
     """Is good for all types where values have form: prefix'value'"""
 
     def __init__(self, prefix):
-        super(EdmPrefixedTypTraits, self).__init__()
+        super().__init__()
         self._prefix = prefix
 
     def to_literal(self, value):
@@ -423,7 +423,7 @@ class EdmDateTimeTypTraits(EdmPrefixedTypTraits):
     """
 
     def __init__(self):
-        super(EdmDateTimeTypTraits, self).__init__('datetime')
+        super().__init__('datetime')
 
     def to_literal(self, value):
         """Convert python datetime representation to literal format
@@ -440,7 +440,7 @@ def to_literal(self, value):
             raise PyODataModelError('Edm.DateTime accepts only UTC')
 
         # Sets timezone to none to avoid including timezone information in the literal form.
-        return super(EdmDateTimeTypTraits, self).to_literal(value.replace(tzinfo=None).isoformat())
+        return super().to_literal(value.replace(tzinfo=None).isoformat())
 
     def to_json(self, value):
         if isinstance(value, str):
@@ -484,7 +484,7 @@ def from_literal(self, value):
         if value is None:
             return None
 
-        value = super(EdmDateTimeTypTraits, self).from_literal(value)
+        value = super().from_literal(value)
 
         return parse_datetime_literal(value).replace(tzinfo=datetime.timezone.utc)
 
@@ -509,7 +509,7 @@ class EdmDateTimeOffsetTypTraits(EdmPrefixedTypTraits):
     """
 
     def __init__(self):
-        super(EdmDateTimeOffsetTypTraits, self).__init__('datetimeoffset')
+        super().__init__('datetimeoffset')
 
     def to_literal(self, value):
         """Convert python datetime representation to literal format"""
@@ -518,7 +518,7 @@ def to_literal(self, value):
             raise PyODataModelError(
                 f'Cannot convert value of type {type(value)} to literal. Datetime format including offset is required.')
 
-        return super(EdmDateTimeOffsetTypTraits, self).to_literal(value.isoformat())
+        return super().to_literal(value.isoformat())
 
     def to_json(self, value):
         # datetime.timestamp() does not work due to its limited precision
@@ -552,7 +552,7 @@ def from_literal(self, value):
         if value is None:
             return None
 
-        value = super(EdmDateTimeOffsetTypTraits, self).from_literal(value)
+        value = super().from_literal(value)
 
         try:
             normalized = value.upper().replace('Z', '+00:00')
@@ -639,7 +639,7 @@ def __init__(self, precision, suffix, conversion):
         self.conversion = conversion
 
     def __repr__(self):
-        parent = super(EdmFPNumTypTraits, self).__repr__()
+        parent = super().__repr__()
 
         return f'{parent}({self.precision},{self.suffix})'
 
@@ -677,7 +677,7 @@ class EdmStructTypTraits(TypTraits):
     """Edm structural types (EntityType, ComplexType) traits"""
 
     def __init__(self, edm_type=None):
-        super(EdmStructTypTraits, self).__init__()
+        super().__init__()
         self._edm_type = edm_type
 
     # pylint: disable=no-self-use
@@ -716,7 +716,7 @@ class Typ(Identifier):
     Kinds = Enum('Kinds', 'Primitive Complex')
 
     def __init__(self, name, null_value, traits=TypTraits(), kind=None):
-        super(Typ, self).__init__(name)
+        super().__init__(name)
 
         self._null_value = null_value
         self._kind = kind if kind is not None else Typ.Kinds.Primitive  # no way how to us enum value for parameter default value
@@ -743,7 +743,7 @@ class Collection(Typ):
     """Represents collection items"""
 
     def __init__(self, name, item_type):
-        super(Collection, self).__init__(name, [], kind=item_type.kind)
+        super().__init__(name, [], kind=item_type.kind)
         self._item_type = item_type
 
     def __repr__(self):
@@ -780,7 +780,7 @@ class VariableDeclaration(Identifier):
     MAXIMUM_LENGTH = -1
 
     def __init__(self, name, type_info, nullable, max_length, precision, scale, fixed_length=None):
-        super(VariableDeclaration, self).__init__(name)
+        super().__init__(name)
 
         self._type_info = type_info
         self._typ = None
@@ -962,7 +962,7 @@ def __getitem__(self, key):
                 raise KeyError(f'There is no Schema Namespace {key}')
 
     def __init__(self, config: Config):
-        super(Schema, self).__init__()
+        super().__init__()
 
         self._decls = Schema.Declarations()
         self._config = config
@@ -1469,7 +1469,7 @@ def from_etree(schema_nodes, config: Config):
 
 class StructType(Typ):
     def __init__(self, name, label, is_value_list):
-        super(StructType, self).__init__(name, None, EdmStructTypTraits(self), Typ.Kinds.Complex)
+        super().__init__(name, None, EdmStructTypTraits(self), Typ.Kinds.Complex)
 
         self._label = label
         self._is_value_list = is_value_list
@@ -1565,7 +1565,7 @@ def parent(self):
 
 class EnumType(Identifier):
     def __init__(self, name, is_flags, underlying_type, namespace):
-        super(EnumType, self).__init__(name)
+        super().__init__(name)
         self._member = list()
         self._underlying_type = underlying_type
         self._traits = TypTraits()
@@ -1656,7 +1656,7 @@ def namespace(self):
 
 class EntityType(StructType):
     def __init__(self, name, label, is_value_list):
-        super(EntityType, self).__init__(name, label, is_value_list)
+        super().__init__(name, label, is_value_list)
 
         self._key = list()
         self._nav_properties = dict()
@@ -1695,7 +1695,7 @@ def from_etree(cls, type_node, config: Config):
 class EntitySet(Identifier):
     def __init__(self, name, entity_type_info, addressable, creatable, updatable, deletable, searchable, countable,
                  pageable, topable, req_filter, label):
-        super(EntitySet, self).__init__(name)
+        super().__init__(name)
 
         self._entity_type_info = entity_type_info
         self._entity_type = None
@@ -1803,7 +1803,7 @@ class StructTypeProperty(VariableDeclaration):
     def __init__(self, name, type_info, nullable, max_length, precision, scale, uncode, label, creatable, updatable,
                  sortable, filterable, filter_restr, req_in_filter, text, visible, display_format, value_list,
                  fixed_length=None):
-        super(StructTypeProperty, self).__init__(name, type_info, nullable, max_length, precision, scale, fixed_length)
+        super().__init__(name, type_info, nullable, max_length, precision, scale, fixed_length)
 
         self._value_helper = None
         self._struct_type = None
@@ -1964,7 +1964,7 @@ class NavigationTypeProperty(VariableDeclaration):
     """
 
     def __init__(self, name, from_role_name, to_role_name, association_info):
-        super(NavigationTypeProperty, self).__init__(name, None, False, None, None, None, None)
+        super().__init__(name, None, False, None, None, None, None)
 
         self.from_role_name = from_role_name
         self.to_role_name = to_role_name
@@ -2304,7 +2304,7 @@ class Annotation:
     Kinds = Enum('Kinds', 'ValueHelper')
 
     def __init__(self, kind, target, qualifier=None):
-        super(Annotation, self).__init__()
+        super().__init__()
 
         self._kind = kind
         self._element_namespace, self._element = target.split('.')
@@ -2360,7 +2360,7 @@ def __init__(self, target, collection_path, label, search_supported):
 
         # pylint: disable=unused-argument
 
-        super(ValueHelper, self).__init__(Annotation.Kinds.ValueHelper, target)
+        super().__init__(Annotation.Kinds.ValueHelper, target)
 
         self._entity_type_name, self._proprty_name = self.element.split('/')
         self._proprty = None
@@ -2486,7 +2486,7 @@ class ValueHelperParameter:
     Direction = Enum('Direction', 'In InOut Out DisplayOnly FilterOnly Constant Constants')
 
     def __init__(self, direction, local_property_name, list_property_name):
-        super(ValueHelperParameter, self).__init__()
+        super().__init__()
 
         self._direction = direction
         self._value_helper = None
@@ -2566,7 +2566,7 @@ def from_etree(value_help_parameter_node):
 
 class FunctionImport(Identifier):
     def __init__(self, name, return_type_info, entity_set, parameters, http_method='GET'):
-        super(FunctionImport, self).__init__(name)
+        super().__init__(name)
 
         self._entity_set_name = entity_set
         self._return_type_info = return_type_info
@@ -2637,7 +2637,7 @@ class FunctionImportParameter(VariableDeclaration):
     Modes = Enum('Modes', 'In Out InOut')
 
     def __init__(self, name, type_info, nullable, max_length, precision, scale, mode):
-        super(FunctionImportParameter, self).__init__(name, type_info, nullable, max_length, precision, scale, None)
+        super().__init__(name, type_info, nullable, max_length, precision, scale, None)
 
         self._mode = mode
 
diff --git a/pyodata/v2/service.py b/pyodata/v2/service.py
index 97145a1..10b5d7a 100644
--- a/pyodata/v2/service.py
+++ b/pyodata/v2/service.py
@@ -383,8 +383,8 @@ class EntityGetRequest(ODataHttpRequest):
     """Used for GET operations of a single entity"""
 
     def __init__(self, handler, entity_key, entity_set_proxy, encode_path=True):
-        super(EntityGetRequest, self).__init__(entity_set_proxy.service.url, entity_set_proxy.service.connection,
-                                               handler, response_hook=entity_set_proxy.service.response_hook)
+        super().__init__(entity_set_proxy.service.url, entity_set_proxy.service.connection,
+                         handler, response_hook=entity_set_proxy.service.response_hook)
         self._logger = logging.getLogger(LOGGER_NAME)
         self._entity_key = entity_key
         self._entity_set_proxy = entity_set_proxy
@@ -423,7 +423,7 @@ def get_default_headers(self):
         return {'Accept': 'application/json'}
 
     def get_query_params(self):
-        qparams = super(EntityGetRequest, self).get_query_params()
+        qparams = super().get_query_params()
 
         if self._select is not None:
             qparams['$select'] = self._select
@@ -462,12 +462,12 @@ class NavEntityGetRequest(EntityGetRequest):
     """Used for GET operations of a single entity accessed via a Navigation property"""
 
     def __init__(self, handler, master_key, entity_set_proxy, nav_property):
-        super(NavEntityGetRequest, self).__init__(handler, master_key, entity_set_proxy)
+        super().__init__(handler, master_key, entity_set_proxy)
 
         self._nav_property = nav_property
 
     def get_path(self):
-        return f"{super(NavEntityGetRequest, self).get_path()}/{self._nav_property}"
+        return f"{super().get_path()}/{self._nav_property}"
 
 
 class EntityCreateRequest(ODataHttpRequest):
@@ -477,7 +477,7 @@ class EntityCreateRequest(ODataHttpRequest):
        and get the newly created entity."""
 
     def __init__(self, url, connection, handler, entity_set, last_segment=None, response_hook=None):
-        super(EntityCreateRequest, self).__init__(url, connection, handler, response_hook=response_hook)
+        super().__init__(url, connection, handler, response_hook=response_hook)
         self._logger = logging.getLogger(LOGGER_NAME)
         self._entity_set = entity_set
         self._entity_type = entity_set.entity_type
@@ -564,7 +564,7 @@ class EntityDeleteRequest(ODataHttpRequest):
     """Used for deleting entity (DELETE operations on a single entity)"""
 
     def __init__(self, url, connection, handler, entity_set, entity_key, encode_path=True, response_hook=None):
-        super(EntityDeleteRequest, self).__init__(url, connection, handler, response_hook=response_hook)
+        super().__init__(url, connection, handler, response_hook=response_hook)
         self._logger = logging.getLogger(LOGGER_NAME)
         self._entity_set = entity_set
         self._entity_key = entity_key
@@ -598,7 +598,7 @@ class EntityModifyRequest(ODataHttpRequest):
     # pylint: disable=too-many-arguments
     def __init__(self, url, connection, handler, entity_set, entity_key, method="PATCH", encode_path=True,
                  response_hook=None):
-        super(EntityModifyRequest, self).__init__(url, connection, handler, response_hook=response_hook)
+        super().__init__(url, connection, handler, response_hook=response_hook)
         self._logger = logging.getLogger(LOGGER_NAME)
         self._entity_set = entity_set
         self._entity_type = entity_set.entity_type
@@ -663,7 +663,7 @@ class QueryRequest(ODataHttpRequest):
     # pylint: disable=too-many-instance-attributes
 
     def __init__(self, url, connection, handler, last_segment, response_hook=None):
-        super(QueryRequest, self).__init__(url, connection, handler, response_hook=response_hook)
+        super().__init__(url, connection, handler, response_hook=response_hook)
 
         self._logger = logging.getLogger(LOGGER_NAME)
         self._count = None
@@ -750,7 +750,7 @@ def get_query_params(self):
         if self._next_url:
             return {}
 
-        qparams = super(QueryRequest, self).get_query_params()
+        qparams = super().get_query_params()
 
         if self._top is not None:
             qparams['$top'] = self._top
@@ -780,7 +780,7 @@ class FunctionRequest(QueryRequest):
     """Function import request (Service call)"""
 
     def __init__(self, url, connection, handler, function_import, response_hook=None):
-        super(FunctionRequest, self).__init__(
+        super().__init__(
             url, connection, handler, function_import.name,
             response_hook=response_hook)
 
@@ -1074,7 +1074,7 @@ class NavEntityProxy(EntityProxy):
 
     def __init__(self, parent_entity, prop_name, entity_type, entity):
         # pylint: disable=protected-access
-        super(NavEntityProxy, self).__init__(parent_entity._service, parent_entity._entity_set, entity_type, entity)
+        super().__init__(parent_entity._service, parent_entity._entity_set, entity_type, entity)
 
         self._parent_entity = parent_entity
         self._prop_name = prop_name
@@ -1317,7 +1317,7 @@ def _build_expression(self, field_name, operator, value):
             return f'substringof({value}, {field_name}) eq true'
 
         if operator == 'range':
-            if not isinstance(value, (tuple, list)):
+            if not isinstance(value, tuple | list):
                 raise TypeError(f'Range must be tuple or list not {type(value)}')
 
             if len(value) != 2:
@@ -1347,7 +1347,7 @@ class GetEntitySetRequest(QueryRequest):
     """GET on EntitySet"""
 
     def __init__(self, url, connection, handler, last_segment, entity_type, encode_path=True, response_hook=None):
-        super(GetEntitySetRequest, self).__init__(url, connection, handler, last_segment, response_hook=response_hook)
+        super().__init__(url, connection, handler, last_segment, response_hook=response_hook)
 
         self._entity_type = entity_type
         self._encode_path = encode_path
@@ -1392,7 +1392,7 @@ class ListWithTotalCount(list):
     """
 
     def __init__(self, total_count, next_url):
-        super(ListWithTotalCount, self).__init__()
+        super().__init__()
         self._total_count = total_count
         self._next_url = next_url
 
@@ -1723,7 +1723,7 @@ def function_import_handler(fimport, response):
             response_data = response.json()['d']
 
             # 1. if return type is an entity type or collection, resolve the entity set once
-            if isinstance(fimport.return_type, (model.EntityType, model.Collection)):
+            if isinstance(fimport.return_type, model.EntityType | model.Collection):
                 entity_set = self._service.schema.entity_set(fimport.entity_set_name)
 
             if isinstance(fimport.return_type, model.EntityType):
@@ -1915,7 +1915,7 @@ class MultipartRequest(ODataHttpRequest):
     """HTTP Batch request"""
 
     def __init__(self, url, connection, handler, request_id=None):
-        super(MultipartRequest, self).__init__(url, connection, partial(MultipartRequest.http_response_handler, self))
+        super().__init__(url, connection, partial(MultipartRequest.http_response_handler, self))
 
         self.requests = []
         self._handler_decoded = handler
diff --git a/pyodata/vendor/SAP.py b/pyodata/vendor/SAP.py
index ef78b91..7dae5ed 100644
--- a/pyodata/vendor/SAP.py
+++ b/pyodata/vendor/SAP.py
@@ -99,6 +99,6 @@ def __init__(self, message, response):
                 'The HTTP error is not a SAP BusinessGateway JSON error')
             logging.debug('JSON parsing error: %s', str(ex))
 
-        super(BusinessGatewayError, self).__init__(message, response)
+        super().__init__(message, response)
 
         self.errordetails = errordetails