diff --git a/mypy.ini b/mypy.ini
index 5de83593..8d7ecd55 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -9,7 +9,3 @@ exclude = (?x)(
   )
 show_error_codes = True
 pretty = True
-
-# suppress error on conditional import of typing_extensions module
-[mypy-optimizely.helpers.types]
-no_warn_unused_ignores = True
diff --git a/optimizely/bucketer.py b/optimizely/bucketer.py
index d1e0b047..e21fb865 100644
--- a/optimizely/bucketer.py
+++ b/optimizely/bucketer.py
@@ -12,19 +12,12 @@
 # limitations under the License.
 
 from __future__ import annotations
-from typing import Optional, TYPE_CHECKING, cast
+from typing import Optional, TYPE_CHECKING, cast, Final
 import math
-from sys import version_info
 
 from .lib import pymmh3 as mmh3
 
 
-if version_info < (3, 8):
-    from typing_extensions import Final
-else:
-    from typing import Final
-
-
 if TYPE_CHECKING:
     # prevent circular dependenacy by skipping import at runtime
     from .project_config import ProjectConfig
diff --git a/optimizely/decision/optimizely_decide_option.py b/optimizely/decision/optimizely_decide_option.py
index 0443ddef..7e5e4350 100644
--- a/optimizely/decision/optimizely_decide_option.py
+++ b/optimizely/decision/optimizely_decide_option.py
@@ -11,12 +11,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from sys import version_info
-
-if version_info < (3, 8):
-    from typing_extensions import Final
-else:
-    from typing import Final
+from typing import Final
 
 
 class OptimizelyDecideOption:
diff --git a/optimizely/decision/optimizely_decision_message.py b/optimizely/decision/optimizely_decision_message.py
index c6178322..27112d8f 100644
--- a/optimizely/decision/optimizely_decision_message.py
+++ b/optimizely/decision/optimizely_decision_message.py
@@ -11,12 +11,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from sys import version_info
-
-if version_info < (3, 8):
-    from typing_extensions import Final
-else:
-    from typing import Final
+from typing import Final
 
 
 class OptimizelyDecisionMessage:
diff --git a/optimizely/entities.py b/optimizely/entities.py
index 39caafe6..b928141c 100644
--- a/optimizely/entities.py
+++ b/optimizely/entities.py
@@ -11,13 +11,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 from __future__ import annotations
-from typing import TYPE_CHECKING, Any, Optional, Sequence
-from sys import version_info
-
-if version_info < (3, 8):
-    from typing_extensions import Final
-else:
-    from typing import Final
+from typing import TYPE_CHECKING, Any, Optional, Sequence, Final
 
 
 if TYPE_CHECKING:
diff --git a/optimizely/event/event_factory.py b/optimizely/event/event_factory.py
index b6a9c02a..34bc04e2 100644
--- a/optimizely/event/event_factory.py
+++ b/optimizely/event/event_factory.py
@@ -12,8 +12,7 @@
 # limitations under the License.
 
 from __future__ import annotations
-from typing import TYPE_CHECKING, Optional, Sequence, cast, List
-from sys import version_info
+from typing import TYPE_CHECKING, Optional, Sequence, cast, List, Final
 from optimizely import entities
 from optimizely.helpers import enums
 from optimizely.helpers import event_tag_utils
@@ -23,11 +22,6 @@
 from . import payload
 from . import user_event
 
-if version_info < (3, 8):
-    from typing_extensions import Final
-else:
-    from typing import Final
-
 if TYPE_CHECKING:
     # prevent circular dependenacy by skipping import at runtime
     from optimizely.project_config import ProjectConfig
diff --git a/optimizely/event/event_processor.py b/optimizely/event/event_processor.py
index bdce6d9d..0d0211d0 100644
--- a/optimizely/event/event_processor.py
+++ b/optimizely/event/event_processor.py
@@ -17,10 +17,9 @@
 import threading
 import time
 
-from typing import Optional
+from typing import Optional, Final
 from datetime import timedelta
 import queue
-from sys import version_info
 
 from optimizely import logger as _logging
 from optimizely import notification_center as _notification_center
@@ -31,12 +30,6 @@
 from .user_event import UserEvent
 
 
-if version_info < (3, 8):
-    from typing_extensions import Final
-else:
-    from typing import Final
-
-
 class BaseEventProcessor(ABC):
     """ Class encapsulating event processing. Override with your own implementation. """
 
diff --git a/optimizely/event/log_event.py b/optimizely/event/log_event.py
index 49c344dd..568c2cef 100644
--- a/optimizely/event/log_event.py
+++ b/optimizely/event/log_event.py
@@ -12,17 +12,10 @@
 # limitations under the License.
 
 from __future__ import annotations
-from typing import Optional, Any
-from sys import version_info
+from typing import Optional, Any, Literal
 from optimizely import event_builder
 
 
-if version_info < (3, 8):
-    from typing_extensions import Literal
-else:
-    from typing import Literal
-
-
 class LogEvent(event_builder.Event):
     """ Representation of an event which can be sent to Optimizely events API. """
 
diff --git a/optimizely/event/user_event.py b/optimizely/event/user_event.py
index 8006c052..a2cb2df7 100644
--- a/optimizely/event/user_event.py
+++ b/optimizely/event/user_event.py
@@ -13,18 +13,11 @@
 from __future__ import annotations
 import time
 import uuid
-from typing import TYPE_CHECKING, Optional
-from sys import version_info
+from typing import TYPE_CHECKING, Optional, Final
 
 from optimizely import version
 
 
-if version_info < (3, 8):
-    from typing_extensions import Final
-else:
-    from typing import Final
-
-
 if TYPE_CHECKING:
     # prevent circular dependenacy by skipping import at runtime
     from optimizely.entities import Experiment, Variation, Event, Holdout
diff --git a/optimizely/event_builder.py b/optimizely/event_builder.py
index 7ef6b347..67169d2a 100644
--- a/optimizely/event_builder.py
+++ b/optimizely/event_builder.py
@@ -13,9 +13,8 @@
 
 from __future__ import annotations
 import time
-from typing import TYPE_CHECKING, Any, Optional
+from typing import TYPE_CHECKING, Any, Optional, Final, Literal
 import uuid
-from sys import version_info
 
 from . import version
 from .event import event_id_normalizer
@@ -23,11 +22,6 @@
 from .helpers import event_tag_utils
 from .helpers import validator
 
-if version_info < (3, 8):
-    from typing_extensions import Final, Literal
-else:
-    from typing import Final, Literal
-
 if TYPE_CHECKING:
     # prevent circular dependenacy by skipping import at runtime
     from .entities import Experiment
diff --git a/optimizely/event_dispatcher.py b/optimizely/event_dispatcher.py
index b06b9e18..cf468340 100644
--- a/optimizely/event_dispatcher.py
+++ b/optimizely/event_dispatcher.py
@@ -13,7 +13,7 @@
 
 import json
 import logging
-from sys import version_info
+from typing import Protocol
 
 import requests
 from requests import exceptions as request_exception
@@ -23,11 +23,6 @@
 from . import event_builder
 from .helpers.enums import HTTPVerbs, EventDispatchConfig
 
-if version_info < (3, 8):
-    from typing_extensions import Protocol
-else:
-    from typing import Protocol
-
 
 class CustomEventDispatcher(Protocol):
     """Interface for a custom event dispatcher and required method `dispatch_event`. """
diff --git a/optimizely/helpers/condition.py b/optimizely/helpers/condition.py
index 40338b40..48f097d9 100644
--- a/optimizely/helpers/condition.py
+++ b/optimizely/helpers/condition.py
@@ -14,8 +14,7 @@
 from __future__ import annotations
 import json
 import numbers
-from typing import TYPE_CHECKING, Any, Callable, Optional
-from sys import version_info
+from typing import TYPE_CHECKING, Any, Callable, Optional, Literal, Final
 
 from . import validator
 from optimizely import optimizely_user_context
@@ -29,12 +28,6 @@
     from optimizely.logger import Logger
 
 
-if version_info < (3, 8):
-    from typing_extensions import Literal, Final
-else:
-    from typing import Literal, Final
-
-
 class ConditionOperatorTypes:
     AND: Final = 'and'
     OR: Final = 'or'
diff --git a/optimizely/helpers/enums.py b/optimizely/helpers/enums.py
index 2d1d4676..0e4eb316 100644
--- a/optimizely/helpers/enums.py
+++ b/optimizely/helpers/enums.py
@@ -12,12 +12,7 @@
 # limitations under the License.
 
 import logging
-from sys import version_info
-
-if version_info < (3, 8):
-    from typing_extensions import Final
-else:
-    from typing import Final
+from typing import Final
 
 
 class CommonAudienceEvaluationLogs:
diff --git a/optimizely/helpers/event_tag_utils.py b/optimizely/helpers/event_tag_utils.py
index ad90cc13..61825950 100644
--- a/optimizely/helpers/event_tag_utils.py
+++ b/optimizely/helpers/event_tag_utils.py
@@ -12,16 +12,10 @@
 # limitations under the License.
 
 from __future__ import annotations
-from typing import TYPE_CHECKING, Any, Optional, NewType, Dict
+from typing import TYPE_CHECKING, Any, Optional, NewType, Dict, Final
 from . import enums
 import math
 import numbers
-from sys import version_info
-
-if version_info < (3, 8):
-    from typing_extensions import Final
-else:
-    from typing import Final
 
 
 if TYPE_CHECKING:
diff --git a/optimizely/helpers/types.py b/optimizely/helpers/types.py
index 7b65ab13..2d8ba7d4 100644
--- a/optimizely/helpers/types.py
+++ b/optimizely/helpers/types.py
@@ -12,14 +12,7 @@
 # limitations under the License.
 from __future__ import annotations
 
-from typing import Literal, Optional, Any
-from sys import version_info
-
-
-if version_info < (3, 8):
-    from typing_extensions import TypedDict
-else:
-    from typing import TypedDict  # type: ignore
+from typing import Literal, Optional, Any, TypedDict
 
 
 # Intermediate types for type checking deserialized datafile json before actual class instantiation.
diff --git a/optimizely/logger.py b/optimizely/logger.py
index 42f879de..c50b3694 100644
--- a/optimizely/logger.py
+++ b/optimizely/logger.py
@@ -11,17 +11,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import logging
-from typing import Any, Optional, Union
+from typing import Any, Optional, Union, Final
 import warnings
-from sys import version_info
 
 from .helpers import enums
 
-if version_info < (3, 8):
-    from typing_extensions import Final
-else:
-    from typing import Final
-
 
 _DEFAULT_LOG_FORMAT: Final = '%(levelname)-8s %(asctime)s %(filename)s:%(lineno)s:%(message)s'
 
diff --git a/optimizely/notification_center.py b/optimizely/notification_center.py
index 3d0b0cba..b6b89ffd 100644
--- a/optimizely/notification_center.py
+++ b/optimizely/notification_center.py
@@ -12,15 +12,9 @@
 # limitations under the License.
 
 from __future__ import annotations
-from typing import Any, Callable, Optional
+from typing import Any, Callable, Optional, Final
 from .helpers import enums
 from . import logger as optimizely_logger
-from sys import version_info
-
-if version_info < (3, 8):
-    from typing_extensions import Final
-else:
-    from typing import Final
 
 
 NOTIFICATION_TYPES: Final = tuple(
diff --git a/optimizely/odp/lru_cache.py b/optimizely/odp/lru_cache.py
index 64337dad..55d62a94 100644
--- a/optimizely/odp/lru_cache.py
+++ b/optimizely/odp/lru_cache.py
@@ -16,13 +16,7 @@
 import threading
 from time import time
 from collections import OrderedDict
-from typing import Optional, Generic, TypeVar, Hashable
-from sys import version_info
-
-if version_info < (3, 8):
-    from typing_extensions import Protocol
-else:
-    from typing import Protocol
+from typing import Optional, Generic, TypeVar, Hashable, Protocol
 
 # generic type definitions for LRUCache parameters
 K = TypeVar('K', bound=Hashable, contravariant=True)
diff --git a/optimizely/odp/optimizely_odp_option.py b/optimizely/odp/optimizely_odp_option.py
index 94e1e90e..62163fd7 100644
--- a/optimizely/odp/optimizely_odp_option.py
+++ b/optimizely/odp/optimizely_odp_option.py
@@ -11,12 +11,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from sys import version_info
-
-if version_info < (3, 8):
-    from typing_extensions import Final
-else:
-    from typing import Final
+from typing import Final
 
 
 class OptimizelyOdpOption:
diff --git a/optimizely/project_config.py b/optimizely/project_config.py
index a7152ae8..3cbf730e 100644
--- a/optimizely/project_config.py
+++ b/optimizely/project_config.py
@@ -12,8 +12,7 @@
 # limitations under the License.
 from __future__ import annotations
 import json
-from typing import TYPE_CHECKING, Optional, Type, TypeVar, Union, cast, Any, Iterable, List
-from sys import version_info
+from typing import TYPE_CHECKING, Optional, Type, TypeVar, Union, cast, Any, Iterable, List, Final
 
 from . import entities
 from . import exceptions
@@ -21,11 +20,6 @@
 from .helpers import enums
 from .helpers import types
 
-if version_info < (3, 8):
-    from typing_extensions import Final
-else:
-    from typing import Final
-
 if TYPE_CHECKING:
     # prevent circular dependenacy by skipping import at runtime
     from .logger import Logger
diff --git a/optimizely/user_profile.py b/optimizely/user_profile.py
index e3a56195..591df5ea 100644
--- a/optimizely/user_profile.py
+++ b/optimizely/user_profile.py
@@ -12,19 +12,13 @@
 # limitations under the License.
 
 from __future__ import annotations
-from typing import Any, Optional
-from sys import version_info
+from typing import Any, Optional, Final, TYPE_CHECKING
 from . import logger as _logging
 
-if version_info < (3, 8):
-    from typing_extensions import Final
-else:
-    from typing import Final, TYPE_CHECKING
-
-    if TYPE_CHECKING:
-        # prevent circular dependenacy by skipping import at runtime
-        from .entities import Experiment, Variation
-        from optimizely.error_handler import BaseErrorHandler
+if TYPE_CHECKING:
+    # prevent circular dependenacy by skipping import at runtime
+    from .entities import Experiment, Variation
+    from optimizely.error_handler import BaseErrorHandler
 
 
 class UserProfile: