diff --git a/src/backend/backend_ga4.py b/src/backend/backend_ga4.py
index cf8b89c..4f12ae5 100644
--- a/src/backend/backend_ga4.py
+++ b/src/backend/backend_ga4.py
@@ -2,8 +2,8 @@
 # SPDX-License-Identifier: Apache-2.0
 
 import json
-import logging as log
 import uuid
+from copy import copy
 from urllib import request
 
 from .backend import TelemetryBackend
@@ -41,11 +41,12 @@ def send(self, message: dict):
             else:
                 raise ValueError("Incorrect backend URL.")
 
-            request.urlopen(req) #nosec
+            request.urlopen(req)  # nosec
         except Exception as err:
             pass  # nosec
 
     def build_event_message(self, event_category: str, event_action: str, event_label: str, event_value: int = 1,
+                            app_name=None, app_version=None,
                             **kwargs):
         client_id = self.cid
         if client_id is None:
@@ -53,6 +54,12 @@ def build_event_message(self, event_category: str, event_action: str, event_labe
         if self.session_id is None:
             self.generate_new_session_id()
 
+        default_args = copy(self.default_message_attrs)
+        if app_name is not None:
+            default_args['app_name'] = app_name
+        if app_version is not None:
+            default_args['app_version'] = app_version
+
         payload = {
             "client_id": client_id,
             "non_personalized_ads": False,
@@ -64,7 +71,7 @@ def build_event_message(self, event_category: str, event_action: str, event_labe
                         "event_label": event_label,
                         "event_count": event_value,
                         "session_id": self.session_id,
-                        **self.default_message_attrs,
+                        **default_args,
                     }
                 }
             ]
@@ -85,7 +92,8 @@ def build_stack_trace_message(self, category: str, error_msg: str, **kwargs):
         return self.build_event_message(category, "stack_trace", error_msg, 1)
 
     def generate_new_cid_file(self):
-        self.cid = get_or_generate_cid(self.cid_filename, lambda: str(uuid.uuid4()), is_valid_cid, self.old_cid_filename)
+        self.cid = get_or_generate_cid(self.cid_filename, lambda: str(uuid.uuid4()), is_valid_cid,
+                                       self.old_cid_filename)
 
     def cid_file_initialized(self):
         return self.cid is not None
diff --git a/src/main.py b/src/main.py
index 745d687..84b16c5 100644
--- a/src/main.py
+++ b/src/main.py
@@ -44,6 +44,7 @@ class Telemetry(metaclass=SingletonMetaClass):
         with opt_in_out script.
         :param disable_in_ci: Turn off telemetry for CI jobs.
     """
+
     def __init__(self, app_name: str = None, app_version: str = None, tid: str = None,
                  backend: [str, None] = 'ga', enable_opt_in_dialog=True, disable_in_ci=False):
         # The case when instance is already configured
@@ -56,7 +57,7 @@ def __init__(self, app_name: str = None, app_version: str = None, tid: str = Non
         self.init(app_name, app_version, tid, backend, enable_opt_in_dialog, disable_in_ci)
 
     def init(self, app_name: str = None, app_version: str = None, tid: str = None,
-                 backend: [str, None] = 'ga', enable_opt_in_dialog=True, disable_in_ci=False):
+             backend: [str, None] = 'ga', enable_opt_in_dialog=True, disable_in_ci=False):
         opt_in_checker = OptInChecker()
         opt_in_check_result = opt_in_checker.check(enable_opt_in_dialog, disable_in_ci)
         if enable_opt_in_dialog:
@@ -168,7 +169,7 @@ def force_shutdown(self, timeout: float = 1.0):
         self.sender.force_shutdown(timeout)
 
     def send_event(self, event_category: str, event_action: str, event_label: str, event_value: int = 1,
-                   force_send=False, **kwargs):
+                   app_name=None, app_version=None, force_send=False, **kwargs):
         """
         Send single event.
 
@@ -176,13 +177,16 @@ def send_event(self, event_category: str, event_action: str, event_label: str, e
         :param event_action: action of the event
         :param event_label: the label associated with the action
         :param event_value: the integer value corresponding to this label
+        :param app_name: application name
+        :param app_version: application version
         :param force_send: forces to send event ignoring the consent value
         :param kwargs: additional parameters
         :return: None
         """
         if self.consent or force_send:
             self.sender.send(self.backend, self.backend.build_event_message(event_category, event_action, event_label,
-                                                                            event_value, **kwargs))
+                                                                            event_value, app_name, app_version,
+                                                                            **kwargs))
 
     def start_session(self, category: str, **kwargs):
         """