diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8beefd3..3358fd9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,13 @@
 # Changelog
 
 ## [Unreleased]
+### Changed
+- Client version updated to [5.7.2](https://github.com/reportportal/client-Python/releases/tag/5.7.2), by @HardNorth
+### Removed
+- `aenum` dependency, by @HardNorth
+- `dill` dependency, by @HardNorth
+
+## [5.6.2]
 ### Added
 - `rp_launch_uuid` configuration parameter, by @HardNorth
 - `rp_launch_attributes` cmd argument, by @fahadnaeemkhan
diff --git a/pytest_reportportal/config.py b/pytest_reportportal/config.py
index 0d6a702..29e56be 100644
--- a/pytest_reportportal/config.py
+++ b/pytest_reportportal/config.py
@@ -28,7 +28,7 @@ class AgentConfig:
     """Storage for the RP agent initialization attributes."""
 
     rp_enabled: bool
-    rp_client_type: Optional[ClientType]
+    rp_client_type: ClientType
     rp_rerun: Optional[bool]
     pconfig: Config
     rp_endpoint: str
@@ -72,7 +72,7 @@ class AgentConfig:
     rp_verify_ssl: Union[bool, str]
     rp_launch_timeout: int
     rp_launch_uuid_print: bool
-    rp_launch_uuid_print_output: Optional[OutputType]
+    rp_launch_uuid_print_output: OutputType
     rp_http_timeout: Optional[Union[tuple[float, float], float]]
     rp_report_fixtures: bool
 
@@ -174,7 +174,7 @@ def __init__(self, pytest_config: Config) -> None:
 
         self.rp_launch_uuid_print = to_bool(self.find_option(pytest_config, "rp_launch_uuid_print") or "False")
         print_output = self.find_option(pytest_config, "rp_launch_uuid_print_output")
-        self.rp_launch_uuid_print_output = OutputType[print_output.upper()] if print_output else None
+        self.rp_launch_uuid_print_output = OutputType[print_output.upper()] if print_output else OutputType.STDOUT
         client_type = self.find_option(pytest_config, "rp_client_type")
         self.rp_client_type = ClientType[client_type.upper()] if client_type else ClientType.SYNC
 
diff --git a/pytest_reportportal/plugin.py b/pytest_reportportal/plugin.py
index 1798b14..6fab6aa 100644
--- a/pytest_reportportal/plugin.py
+++ b/pytest_reportportal/plugin.py
@@ -15,12 +15,12 @@
 
 import logging
 import os.path
+import pickle
 import time
 from logging import Logger
 from typing import Any, Callable, Generator
 
 import _pytest.logging
-import dill as pickle
 import pytest
 
 # noinspection PyPackageRequirements
diff --git a/pytest_reportportal/service.py b/pytest_reportportal/service.py
index c0dff67..bbd6f36 100644
--- a/pytest_reportportal/service.py
+++ b/pytest_reportportal/service.py
@@ -20,13 +20,13 @@
 import threading
 import traceback
 from collections import OrderedDict
+from enum import Enum
 from functools import wraps
 from os import curdir
 from time import sleep, time
 from typing import Any, Callable, Generator, Optional, Union
 
 from _pytest.doctest import DoctestItem
-from aenum import Enum, auto, unique
 from py.path import local
 from pytest import Class, Function, Item, Module, Package, PytestWarning, Session
 from reportportal_client.aio import Task
@@ -74,7 +74,7 @@
 except ImportError:
     Rule = type("dummy", (), {})  # Old pytest-bdd versions do not have Rule
 
-from reportportal_client import RP, ClientType, create_client
+from reportportal_client import RP, OutputType, create_client
 from reportportal_client.helpers import dict_to_payload, gen_attributes, get_launch_sys_attrs, get_package_version
 
 LOGGER = logging.getLogger(__name__)
@@ -125,25 +125,23 @@ def trim_docstring(docstring: str) -> str:
     return "\n".join(trimmed)
 
 
-@unique
 class LeafType(Enum):
     """This class stores test item path types."""
 
-    DIR = auto()
-    FILE = auto()
-    CODE = auto()
-    ROOT = auto()
-    SUITE = auto()
-    NESTED = auto()
+    DIR = 1
+    FILE = 2
+    CODE = 3
+    ROOT = 4
+    SUITE = 5
+    NESTED = 6
 
 
-@unique
 class ExecStatus(Enum):
     """This class stores test item path types."""
 
-    CREATED = auto()
-    IN_PROGRESS = auto()
-    FINISHED = auto()
+    CREATED = 1
+    IN_PROGRESS = 2
+    FINISHED = 3
 
 
 def check_rp_enabled(func):
@@ -190,7 +188,7 @@ def __init__(self, agent_config: AgentConfig) -> None:
         self._start_tracker = set()
         self._launch_id = None
         self.agent_name = "pytest-reportportal"
-        self.agent_version = get_package_version(self.agent_name)
+        self.agent_version = get_package_version(self.agent_name) or "None"
         self.ignored_attributes = []
         self.parent_item_id = None
         self.rp = None
@@ -221,7 +219,7 @@ def _get_launch_attributes(self, ini_attrs: Optional[list[dict[str, str]]]) -> l
         attributes = ini_attrs or []
         system_attributes = get_launch_sys_attrs()
         system_attributes["agent"] = "{}|{}".format(self.agent_name, self.agent_version)
-        return attributes + dict_to_payload(system_attributes)
+        return attributes + (dict_to_payload(system_attributes) or [])
 
     def _build_start_launch_rq(self) -> dict[str, Any]:
         rp_launch_attributes = self._config.rp_launch_attributes
@@ -366,6 +364,7 @@ def _get_scenario_template(self, scenario: Scenario) -> Optional[ScenarioTemplat
                 break
         if scenario_template and isinstance(scenario_template, ScenarioTemplate):
             return scenario_template
+        return None
 
     def _get_method_name(self, item: Item) -> str:
         """Get the original test method name.
@@ -650,20 +649,20 @@ def _get_test_case_id(
         else:
             return base_name + param_str
 
-    def _get_issue_ids(self, mark):
-        issue_ids = mark.kwargs.get("issue_id", [])
+    def _get_issue_ids(self, mark) -> list[Any]:
+        issue_ids = mark.kwargs.get("issue_id", []) or []
         if not isinstance(issue_ids, list):
             issue_ids = [issue_ids]
         return issue_ids
 
-    def _get_issue_urls(self, mark, default_url):
+    def _get_issue_urls(self, mark, default_url: str) -> list[Optional[str]]:
         issue_ids = self._get_issue_ids(mark)
         if not issue_ids:
-            return None
+            return []
         mark_url = mark.kwargs.get("url", None) or default_url
-        return [mark_url.format(issue_id=issue_id) if mark_url else None for issue_id in issue_ids]
+        return [str(mark_url).format(issue_id=str(issue_id)) if mark_url else None for issue_id in issue_ids]
 
-    def _get_issue_description_line(self, mark, default_url):
+    def _get_issue_description_line(self, mark, default_url: str) -> str:
         issue_ids = self._get_issue_ids(mark)
         if not issue_ids:
             return mark.kwargs["reason"]
@@ -693,7 +692,7 @@ def _get_issue(self, mark: Mark) -> Optional[Issue]:
             issue_short_name = mark.kwargs["issue_type"]
 
         # default value
-        issue_short_name = "TI" if issue_short_name is None else issue_short_name
+        issue_short_name = "TI" if issue_short_name is None else str(issue_short_name)
 
         registered_issues = self.issue_types
         issue = None
@@ -824,7 +823,8 @@ def _process_attributes(self, item: Item) -> list[dict[str, Any]]:
         test_attributes = self._config.rp_tests_attributes
         if test_attributes:
             attributes = {
-                (attr.get("key", None), attr["value"]) for attr in gen_attributes(self._config.rp_tests_attributes)
+                (attr.get("key", None), attr["value"])
+                for attr in gen_attributes(self._config.rp_tests_attributes or [])
             }
         else:
             attributes = set()
@@ -1420,7 +1420,7 @@ def start(self) -> None:
         if self._config.rp_launch_uuid:
             launch_id = self._config.rp_launch_uuid
         self.rp = create_client(
-            client_type=self._config.rp_client_type or ClientType.SYNC,
+            client_type=self._config.rp_client_type,
             endpoint=self._config.rp_endpoint,
             project=self._config.rp_project,
             api_key=self._config.rp_api_key,
@@ -1431,7 +1431,7 @@ def start(self) -> None:
             launch_uuid=launch_id,
             log_batch_payload_limit=self._config.rp_log_batch_payload_limit,
             launch_uuid_print=self._config.rp_launch_uuid_print,
-            print_output=self._config.rp_launch_uuid_print_output,
+            print_output=self._config.rp_launch_uuid_print_output or OutputType.STDOUT,
             http_timeout=self._config.rp_http_timeout,
             mode=self._config.rp_mode,
             # OAuth 2.0 parameters
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 4f1e860..76a8e25 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,4 +1,3 @@
-dill>=0.3.6
 pytest>=4.6.10
 delayed-assert
 pytest-cov
diff --git a/requirements.txt b/requirements.txt
index ca2b79b..0944a3d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1 @@
-reportportal-client==5.7.1
-aenum==3.1.17
+reportportal-client==5.7.2
diff --git a/setup.py b/setup.py
index 6f72db0..2e6a4e1 100644
--- a/setup.py
+++ b/setup.py
@@ -17,7 +17,7 @@
 
 from setuptools import setup
 
-__version__ = "5.6.2"
+__version__ = "5.6.3"
 
 
 def read_file(fname):
diff --git a/tests/integration/test_config_handling.py b/tests/integration/test_config_handling.py
index 16d421f..df6bdf5 100644
--- a/tests/integration/test_config_handling.py
+++ b/tests/integration/test_config_handling.py
@@ -214,7 +214,7 @@ def test_launch_uuid_print(mock_client_init):
     assert int(result) == 0, "Exit code should be 0 (no errors)"
     expect(mock_client_init.call_count == 1)
     expect(mock_client_init.call_args_list[0][1]["launch_uuid_print"] == print_uuid)
-    expect(mock_client_init.call_args_list[0][1]["print_output"] is None)
+    expect(mock_client_init.call_args_list[0][1]["print_output"] is OutputType.STDOUT)
     assert_expectations()
 
 
@@ -248,7 +248,7 @@ def test_no_launch_uuid_print(mock_client_init):
     assert int(result) == 0, "Exit code should be 0 (no errors)"
     expect(mock_client_init.call_count == 1)
     expect(mock_client_init.call_args_list[0][1]["launch_uuid_print"] is False)
-    expect(mock_client_init.call_args_list[0][1]["print_output"] is None)
+    expect(mock_client_init.call_args_list[0][1]["print_output"] is OutputType.STDOUT)
     assert_expectations()