diff --git a/.gitea/workflows/tests.yml b/.gitea/workflows/tests.yml
index f8daeed..863f122 100644
--- a/.gitea/workflows/tests.yml
+++ b/.gitea/workflows/tests.yml
@@ -15,7 +15,7 @@ jobs:
     container: catthehacker/ubuntu:act-latest
     strategy:
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
 
     steps:
       - uses: actions/checkout@v3
diff --git a/README.md b/README.md
index a8910dd..f428978 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ Small module that makes your journey with RMV REST API somehow easier. Based ful
 ## Requirements
 
 * RMV API key (Get it [here](https://opendata.rmv.de/site/start.html))
-* Python 3.8+
+* Python 3.9+
 * git (Only for installation from source)
 
 ## Installation
diff --git a/pyproject.toml b/pyproject.toml
index ac2b3b5..c1d16bf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,7 @@ authors = [{ name = "Profitroll", email = "profitroll@end-play.xyz" }]
 maintainers = [{ name = "Profitroll", email = "profitroll@end-play.xyz" }]
 description = "Small module that makes your journey with RMV REST API somehow easier."
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 license = { text = "MIT" }
 classifiers = [
     "Development Status :: 3 - Alpha",
@@ -17,7 +17,6 @@ classifiers = [
     "License :: OSI Approved :: MIT License",
     "Operating System :: OS Independent",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
@@ -46,7 +45,7 @@ speed = { file = "requirements/speed.txt" }
 where = ["src"]
 
 [tool.black]
-target-version = ['py38', 'py39', 'py310', 'py311', 'py312']
+target-version = ['py39', 'py310', 'py311', 'py312']
 line-length = 94
 
 [tool.isort]
@@ -66,7 +65,7 @@ show_error_codes = true
 
 [tool.pylint.main]
 extension-pkg-whitelist = ["ujson"]
-py-version = 3.8
+py-version = 3.9
 
 [tool.coverage.run]
 source = ["pyrmv"]
diff --git a/requirements/_.txt b/requirements/_.txt
index 317f56d..dc66d84 100644
--- a/requirements/_.txt
+++ b/requirements/_.txt
@@ -1,3 +1,3 @@
 requests~=2.32.3
-xmltodict~=0.13.0
-isodate~=0.6.1
\ No newline at end of file
+xmltodict~=0.14.0
+isodate~=0.7.0
\ No newline at end of file
diff --git a/requirements/dev.txt b/requirements/dev.txt
index 5cafd9f..54babc4 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -1,10 +1,10 @@
-black~=24.8.0
+black~=25.1.0
 isort==5.13.2
-mypy~=1.11.2
-pylint==3.2.7
-pytest-cov~=5.0.0
+mypy~=1.15.0
+pylint==3.3.7,<3.4.0
+pytest-cov~=6.1.0
 pytest~=8.3.2
-tox==4.18.1
+tox==4.25.0
 types-ujson~=5.10.0.20240515
 
 # Disabled async libraries for now
diff --git a/requirements/dist.txt b/requirements/dist.txt
index cf431e7..66339e7 100644
--- a/requirements/dist.txt
+++ b/requirements/dist.txt
@@ -1,2 +1,2 @@
-build==1.2.2
-twine~=5.1.1
+build==1.2.2.post1
+twine~=6.1.0
diff --git a/src/pyrmv/__init__.py b/src/pyrmv/__init__.py
index e331cda..e25c38e 100644
--- a/src/pyrmv/__init__.py
+++ b/src/pyrmv/__init__.py
@@ -21,7 +21,7 @@ trip = client.trip_find(origin_id=origin.id, dest_id=destination.id)
 """
 
 __name__ = "pyrmv"
-__version__ = "0.4.0"
+__version__ = "0.5.0"
 __license__ = "MIT License"
 __author__ = "Profitroll"
 
diff --git a/src/pyrmv/classes/board.py b/src/pyrmv/classes/board.py
index c3b69cc..85bf9fb 100644
--- a/src/pyrmv/classes/board.py
+++ b/src/pyrmv/classes/board.py
@@ -1,10 +1,10 @@
 from datetime import datetime
 from typing import Any, List, Mapping, Union
 
-from pyrmv.classes.journey import Journey
-from pyrmv.classes.message import Message
-from pyrmv.classes.stop import Stop
-from pyrmv.utility import ref_upgrade
+from ..classes.journey import Journey
+from ..classes.message import Message
+from ..classes.stop import Stop
+from ..utility import ref_upgrade
 
 
 class LineArrival:
diff --git a/src/pyrmv/classes/client.py b/src/pyrmv/classes/client.py
index e9c9e72..51400ff 100644
--- a/src/pyrmv/classes/client.py
+++ b/src/pyrmv/classes/client.py
@@ -1,7 +1,7 @@
 from datetime import datetime, timedelta
 from typing import List, OrderedDict, Union
 
-from pyrmv.classes import (
+from ..classes import (
     BoardArrival,
     BoardDeparture,
     Journey,
@@ -10,7 +10,7 @@ from pyrmv.classes import (
     StopTrip,
     Trip,
 )
-from pyrmv.enums import (
+from ..enums import (
     AffectedJourneyMode,
     AffectedJourneyStopMode,
     BoardArrivalType,
@@ -22,15 +22,15 @@ from pyrmv.enums import (
     SearchMode,
     SelectionMode,
 )
-from pyrmv.raw import board_arrival as raw_board_arrival
-from pyrmv.raw import board_departure as raw_board_departure
-from pyrmv.raw import him_search as raw_him_search
-from pyrmv.raw import journey_detail as raw_journey_detail
-from pyrmv.raw import stop_by_coords as raw_stop_by_coords
-from pyrmv.raw import stop_by_name as raw_stop_by_name
-from pyrmv.raw import trip_find as raw_trip_find
-from pyrmv.raw import trip_recon as raw_trip_recon
-from pyrmv.utility import find_exception
+from ..raw import board_arrival as raw_board_arrival
+from ..raw import board_departure as raw_board_departure
+from ..raw import him_search as raw_him_search
+from ..raw import journey_detail as raw_journey_detail
+from ..raw import stop_by_coords as raw_stop_by_coords
+from ..raw import stop_by_name as raw_stop_by_name
+from ..raw import trip_find as raw_trip_find
+from ..raw import trip_recon as raw_trip_recon
+from ..utility import find_exception
 
 try:
     from typing import Literal
@@ -150,7 +150,7 @@ class Client:
             boardType=board_type.code,
         )
 
-        find_exception(board_raw)
+        find_exception(board_raw.copy())
 
         return BoardArrival(
             board_raw,
@@ -219,7 +219,7 @@ class Client:
             boardType=board_type.code,
         )
 
-        find_exception(board_raw)
+        find_exception(board_raw.copy())
 
         return BoardDeparture(
             board_raw,
@@ -343,7 +343,7 @@ class Client:
             minprio=priority_min,
         )
 
-        find_exception(messages_raw)
+        find_exception(messages_raw.copy())
 
         if "Message" in messages_raw:
             messages.extend(Message(message) for message in messages_raw["Message"])
@@ -402,7 +402,7 @@ class Client:
             toIdx=to_index,
         )
 
-        find_exception(journey_raw)
+        find_exception(journey_raw.copy())
 
         return Journey(journey_raw)
 
@@ -481,7 +481,7 @@ class Client:
             locationSelectionMode=selection_mode,  # type: ignore
         )
 
-        find_exception(stops_raw)
+        find_exception(stops_raw.copy())
 
         if "stopLocationOrCoordLocation" in stops_raw:
             for stop in stops_raw["stopLocationOrCoordLocation"]:
@@ -536,7 +536,7 @@ class Client:
             accessId=self.access_id, inputString=query, lang=lang.code, maxNo=1
         )
 
-        find_exception(stops_raw)
+        find_exception(stops_raw.copy())
 
         if len(stops_raw["stopLocationOrCoordLocation"]) <= 0:
             return None
@@ -642,7 +642,7 @@ class Client:
             filterMode=filter_mode.code,
         )
 
-        find_exception(stops_raw)
+        find_exception(stops_raw.copy())
 
         if "stopLocationOrCoordLocation" in stops_raw:
             for stop in stops_raw["stopLocationOrCoordLocation"]:
@@ -833,7 +833,7 @@ class Client:
             withFreq=frequency,
         )
 
-        find_exception(trips_raw)
+        find_exception(trips_raw.copy())
 
         if "Trip" in trips_raw:
             trips.extend(Trip(trip) for trip in trips_raw["Trip"])
@@ -913,7 +913,7 @@ class Client:
             trafficMessages=messages,
         )
 
-        find_exception(trips_raw)
+        find_exception(trips_raw.copy())
 
         if "Trip" in trips_raw:
             trips.extend(Trip(trip) for trip in trips_raw["Trip"])
diff --git a/src/pyrmv/classes/journey.py b/src/pyrmv/classes/journey.py
index 45ea7e7..c9e5d0d 100644
--- a/src/pyrmv/classes/journey.py
+++ b/src/pyrmv/classes/journey.py
@@ -1,8 +1,8 @@
 from typing import Any, List, Mapping, Union
 
-from pyrmv.classes.message import Message
-from pyrmv.classes.stop import Stop
-from pyrmv.utility import ref_upgrade
+from ..classes.message import Message
+from ..classes.stop import Stop
+from ..utility import ref_upgrade
 
 
 class Journey:
diff --git a/src/pyrmv/classes/leg.py b/src/pyrmv/classes/leg.py
index 968694a..c8b52aa 100644
--- a/src/pyrmv/classes/leg.py
+++ b/src/pyrmv/classes/leg.py
@@ -3,9 +3,9 @@ from typing import Any, List, Mapping, Union
 
 from isodate import Duration, parse_duration
 
-from pyrmv.classes.gis import Gis
-from pyrmv.classes.message import Message
-from pyrmv.classes.stop import StopTrip
+from ..classes.gis import Gis
+from ..classes.message import Message
+from ..classes.stop import StopTrip
 
 
 class Leg:
diff --git a/src/pyrmv/classes/message.py b/src/pyrmv/classes/message.py
index b08dfe5..09dbeed 100644
--- a/src/pyrmv/classes/message.py
+++ b/src/pyrmv/classes/message.py
@@ -3,7 +3,7 @@ from typing import Any, List, Mapping, Union
 
 from isodate import Duration, parse_duration
 
-from pyrmv.classes.stop import Stop
+from ..classes.stop import Stop
 
 
 class Url:
@@ -59,9 +59,9 @@ class Message:
         self.channels.extend(Channel(channel) for channel in data["channel"])
         self.id: str = data["id"]
         self.active: bool = data["act"]
-        self.head: str = data["head"]
-        self.lead: str = data["lead"]
-        self.text: str = data["text"]
+        self.head: str = "" if "head" not in data else data["head"]
+        self.lead: str = "" if "lead" not in data else data["lead"]
+        self.text: str = "" if "text" not in data else data["text"]
         self.company: Union[str, None] = data.get("company")
         self.category: Union[str, None] = data.get("category")
         self.priority: Union[int, None] = data.get("priority")
@@ -81,8 +81,10 @@ class Message:
                 f"{data['validToDate']} {data['validToTime']}", "%Y-%m-%d %H:%M:%S"
             )
         )
-        self.date_start_alt: str = data["altStart"]
-        self.date_end_alt: str = data["altEnd"]
+        self.date_start_alt: Union[str, None] = (
+            None if "altStart" not in data else data["altStart"]
+        )
+        self.date_end_alt: Union[str, None] = None if "altEnd" not in data else data["altEnd"]
         self.time_modified: Union[datetime, None] = (
             None
             if "modDate" not in data or "modTime" not in data
diff --git a/src/pyrmv/classes/platform_type.py b/src/pyrmv/classes/platform_type.py
index a1afe49..e3ae518 100644
--- a/src/pyrmv/classes/platform_type.py
+++ b/src/pyrmv/classes/platform_type.py
@@ -1,6 +1,6 @@
 from typing import Any, Mapping, Union
 
-from pyrmv.enums.platform_type_type import PlatformTypeType
+from ..enums.platform_type_type import PlatformTypeType
 
 
 class PlatformType:
diff --git a/src/pyrmv/classes/trip.py b/src/pyrmv/classes/trip.py
index 9bab704..e62c6dc 100644
--- a/src/pyrmv/classes/trip.py
+++ b/src/pyrmv/classes/trip.py
@@ -3,8 +3,8 @@ from typing import List, Union
 
 from isodate import Duration, parse_duration
 
-from pyrmv.classes.leg import Leg
-from pyrmv.classes.stop import StopTrip
+from ..classes.leg import Leg
+from ..classes.stop import StopTrip
 
 
 class Trip:
@@ -19,8 +19,10 @@ class Trip:
         self.index: int = data["idx"]
         self.id: str = data["tripId"]
         self.ctx_recon: str = data["ctxRecon"]
-        self.duration: Union[Duration, timedelta] = parse_duration(data["duration"])
-        self.real_time_duration: Union[Duration, timedelta] = (
+        self.duration: Union[Duration, timedelta, None] = (
+            None if "duration" not in data else parse_duration(data["duration"])
+        )
+        self.real_time_duration: Union[Duration, timedelta, None] = (
             None if "rtDuration" not in data else parse_duration(data["rtDuration"])
         )
         self.checksum: str = data["checksum"]
diff --git a/src/pyrmv/enums/auto_name.py b/src/pyrmv/enums/auto_name.py
index d0c07cf..b7a552f 100644
--- a/src/pyrmv/enums/auto_name.py
+++ b/src/pyrmv/enums/auto_name.py
@@ -3,7 +3,7 @@
 
 from enum import Enum
 
-from pyrmv.const import PRODUCTS
+from ..const import PRODUCTS
 
 
 class AutoName(Enum):
diff --git a/src/pyrmv/raw/board_arrival.py b/src/pyrmv/raw/board_arrival.py
index 1e34527..b6674ec 100644
--- a/src/pyrmv/raw/board_arrival.py
+++ b/src/pyrmv/raw/board_arrival.py
@@ -64,7 +64,7 @@ def board_arrival(
     payload = {}
     headers = {"Accept": "application/json"} if json else {"Accept": "application/xml"}
 
-    for var, val in locals().items():
+    for var, val in locals().copy().items():
         if str(var) == "date":
             if val != None:
                 if isinstance(val, datetime):
diff --git a/src/pyrmv/raw/board_departure.py b/src/pyrmv/raw/board_departure.py
index e3cef29..dafe1fc 100644
--- a/src/pyrmv/raw/board_departure.py
+++ b/src/pyrmv/raw/board_departure.py
@@ -65,7 +65,7 @@ def board_departure(
     payload = {}
     headers = {"Accept": "application/json"} if json else {"Accept": "application/xml"}
 
-    for var, val in locals().items():
+    for var, val in locals().copy().items():
         if str(var) == "date":
             if val != None:
                 if isinstance(val, datetime):
diff --git a/src/pyrmv/raw/him_search.py b/src/pyrmv/raw/him_search.py
index c8911cf..535a8e6 100644
--- a/src/pyrmv/raw/him_search.py
+++ b/src/pyrmv/raw/him_search.py
@@ -4,7 +4,7 @@ from typing import OrderedDict, Union
 from requests import get
 from xmltodict import parse as xmlparse
 
-from pyrmv.utility import weekdays_bitmask
+from ..utility import weekdays_bitmask
 
 try:
     from typing import Literal
@@ -97,7 +97,7 @@ def him_search(
     payload = {}
     headers = {"Accept": "application/json"} if json else {"Accept": "application/xml"}
 
-    for var, val in locals().items():
+    for var, val in locals().copy().items():
         if str(var) in {"dateB", "dateE"}:
             if val != None:
                 if isinstance(val, datetime):
diff --git a/src/pyrmv/raw/journey_detail.py b/src/pyrmv/raw/journey_detail.py
index 81235c2..39236d8 100644
--- a/src/pyrmv/raw/journey_detail.py
+++ b/src/pyrmv/raw/journey_detail.py
@@ -55,7 +55,7 @@ def journey_detail(
     payload = {}
     headers = {"Accept": "application/json"} if json else {"Accept": "application/xml"}
 
-    for var, val in locals().items():
+    for var, val in locals().copy().items():
         if str(var) == "rtMode":
             if val != None:
                 payload["rtMode"] = val.upper()
diff --git a/src/pyrmv/raw/stop_by_coords.py b/src/pyrmv/raw/stop_by_coords.py
index b8c7f05..b4fbdf4 100644
--- a/src/pyrmv/raw/stop_by_coords.py
+++ b/src/pyrmv/raw/stop_by_coords.py
@@ -54,7 +54,7 @@ def stop_by_coords(
     payload = {}
     headers = {"Accept": "application/json"} if json else {"Accept": "application/xml"}
 
-    for var, val in locals().items():
+    for var, val in locals().copy().items():
         if str(var) == "stopType":
             if val != None:
                 payload["type"] = val.upper()
diff --git a/src/pyrmv/raw/stop_by_name.py b/src/pyrmv/raw/stop_by_name.py
index 5355a0b..5ac372c 100644
--- a/src/pyrmv/raw/stop_by_name.py
+++ b/src/pyrmv/raw/stop_by_name.py
@@ -65,7 +65,7 @@ def stop_by_name(
     payload = {}
     headers = {"Accept": "application/json"} if json else {"Accept": "application/xml"}
 
-    for var, val in locals().items():
+    for var, val in locals().copy().items():
         if str(var) == "inputString":
             if val != None:
                 payload["input"] = val
diff --git a/src/pyrmv/raw/trip_find.py b/src/pyrmv/raw/trip_find.py
index 8465074..887b2cd 100644
--- a/src/pyrmv/raw/trip_find.py
+++ b/src/pyrmv/raw/trip_find.py
@@ -201,7 +201,7 @@ def trip_find(
     payload = {}
     headers = {"Accept": "application/json"} if json else {"Accept": "application/xml"}
 
-    for var, val in locals().items():
+    for var, val in locals().copy().items():
         if str(var) == "date":
             if val != None:
                 if isinstance(val, datetime):
diff --git a/src/pyrmv/raw/trip_recon.py b/src/pyrmv/raw/trip_recon.py
index e916e1e..ccb0941 100644
--- a/src/pyrmv/raw/trip_recon.py
+++ b/src/pyrmv/raw/trip_recon.py
@@ -87,7 +87,7 @@ def trip_recon(
     payload = {}
     headers = {"Accept": "application/json"} if json else {"Accept": "application/xml"}
 
-    for var, val in locals().items():
+    for var, val in locals().copy().items():
         if str(var) == "date":
             if val != None:
                 if isinstance(val, datetime):
diff --git a/src/pyrmv/utility/find_exception.py b/src/pyrmv/utility/find_exception.py
index eb18ae9..23e4247 100644
--- a/src/pyrmv/utility/find_exception.py
+++ b/src/pyrmv/utility/find_exception.py
@@ -1,4 +1,4 @@
-from pyrmv.errors import (
+from ..errors import (
     ApiAuthError,
     ApiFormatError,
     ApiParamError,
@@ -26,6 +26,7 @@ from pyrmv.errors import (
     SvcNoResultError,
     SvcProductError,
     SvcSearchError,
+    SvcParamError,
     UnknownError,
 )
 
@@ -86,6 +87,9 @@ def find_exception(data: dict):
         elif data["errorCode"] == "SVC_CTX":
             raise SvcContextError()
 
+        elif data["errorCode"] == "SVC_PARAM":
+            raise SvcParamError(errorCode=data["errorCode"], errorText=data["errorText"])
+
         elif data["errorCode"] == "SVC_NO_RESULT":
             raise SvcNoResultError()
 
diff --git a/tox.ini b/tox.ini
index e35f504..65b63f3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,11 +1,10 @@
 [tox]
-minversion = 3.8.0
-envlist = py38, py39, py310, py311, py312
+minversion = 3.9.0
+envlist = py39, py310, py311, py312
 isolated_build = true
 
 [gh-actions]
-python = 
-    3.8: py38
+python =
     3.9: py39
     3.10: py310
     3.11: py311