diff --git a/stt_voice_messages/configs.py b/stt_voice_messages/configs.py
deleted file mode 100644
index c7d505c..0000000
--- a/stt_voice_messages/configs.py
+++ /dev/null
@@ -1,108 +0,0 @@
-# This file is part of Gajim.
-#
-# Gajim is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# Gajim is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with Gajim. If not, see <http://www.gnu.org/licenses/>.
-
-import logging
-import typing
-
-from gajim.common.app import Any
-from gajim.plugins.plugins_i18n import _
-
-from .models import openai_whisper
-from .stt_voice_messages import STTVoiceMessagesPlugin
-
-log = logging.getLogger('gajim.p.stt_voice_messages_config')
-
-SUPPORTED_MODELS: dict[str, dict[str, typing.Union[list[str], Any, str]]] = {
-    'model_openaiwhisper': {
-        'moduls': ['whisper'],
-        'class': openai_whisper.WhisperModel,
-        'name': 'OpenAI Whisper'
-    },
-    'model_ctranslate2': {
-        'moduls': ['ctranslate2'],
-        'class': None,
-        'name': _('CTranslate2')
-    },
-    'model_faster-whisper': {
-        'moduls': ['faster-whisper'],
-        'class': None,
-        'name:': _('Faster-Whisper')
-    },
-    'model_distill': {
-        'moduls': ['transformers', 'accelerate', 'datasets[audio]'],
-        'class': None,
-        'name': _('Distill')
-    }
-}
-
-
-class Configuration:
-    def __init__(self, plugin: STTVoiceMessagesPlugin):
-        self.plugin = plugin
-        self._available_models: dict[
-            str, dict[str, typing.Union[list[str], Any, str]]] = {}
-        self.check_available_moduls()
-
-    @property
-    def available_models(self) -> dict[str, dict[str, typing.Union[list[str], Any, str]]]:
-        return self._available_models
-
-    def on_setting(self, value: Any, data: Any) -> None:
-        if isinstance(value, str):
-            value.strip()
-        log.debug('plugin config before:\n %s', self.plugin.config.data)
-        self.plugin.config[data] = value
-        log.debug('plugin config after:\n %s', self.plugin.config.data)
-
-    def on_set_model(self, value: Any, data: Any) -> None:
-        if isinstance(value, str):
-            value.strip()
-        log.debug('plugin config before:\n %s', self.plugin.config.data)
-        self.plugin.config['model_class'] = self._available_models[value][
-            'class']
-        self.on_setting(value, data)
-        log.debug('plugin config after:\n %s', self.plugin.config.data)
-
-    @staticmethod
-    def is_module_available(module: str) -> bool:
-        try:
-            __import__(module)
-            return True
-        except ModuleNotFoundError:
-            log.debug('Could not find module %s', module)
-            return False
-        except ImportError as ex:
-            log.debug(str(ex))
-            return False
-
-    def check_available_moduls(self):
-        for model in SUPPORTED_MODELS:
-            available = True
-            for modul in SUPPORTED_MODELS[model]['moduls']:
-                if not self.is_module_available(modul):
-                    available = False
-                    continue
-            if available:
-                self._available_models[model] = SUPPORTED_MODELS[model]
-
-        if (self.plugin.config.data['model_class'] is None
-                and len(self._available_models) > 0):
-            model = list(self._available_models)[0]
-            self.on_set_model(model, 'model')
-            log.debug('Choose first available model!')
-        else:
-            log.debug('Available model already chosen!')
-
-        log.debug('models = %s', self._available_models)
diff --git a/stt_voice_messages/gtk/config_dialog.py b/stt_voice_messages/gtk/config_dialog.py
index cf25efe..4592d80 100644
--- a/stt_voice_messages/gtk/config_dialog.py
+++ b/stt_voice_messages/gtk/config_dialog.py
@@ -16,6 +16,7 @@
 from __future__ import annotations
 
 import logging
+import typing
 from pathlib import Path
 from typing import TYPE_CHECKING
 
@@ -23,6 +24,7 @@ import whisper
 from gi.repository import Gtk
 
 from gajim.common import app
+from gajim.common.app import Any
 from gajim.gtk.builder import get_builder
 from gajim.gtk.const import Setting, SettingKind, SettingType
 from gajim.gtk.settings import SettingsBox
@@ -30,7 +32,7 @@ from gajim.gtk.sidebar_switcher import SideBarSwitcher
 from gajim.plugins.helpers import get_builder
 from gajim.plugins.plugins_i18n import _
 
-from ..configs import Configuration
+from ..models import openai_whisper
 
 if TYPE_CHECKING:
     from ..stt_voice_messages import STTVoiceMessagesPlugin
@@ -38,6 +40,95 @@ if TYPE_CHECKING:
 log = logging.getLogger('gajim.p.stt_voice_messages_config_dialog')
 
 
+SUPPORTED_MODELS: dict[str, dict[str, typing.Union[list[str], Any, str]]] = {
+    'model_openaiwhisper': {
+        'moduls': ['whisper'],
+        'class': openai_whisper.WhisperModel,
+        'name': 'OpenAI Whisper'
+    },
+    'model_ctranslate2': {
+        'moduls': ['ctranslate2'],
+        'class': None,
+        'name': _('CTranslate2')
+    },
+    'model_faster-whisper': {
+        'moduls': ['faster-whisper'],
+        'class': None,
+        'name:': _('Faster-Whisper')
+    },
+    'model_distill': {
+        'moduls': ['transformers', 'accelerate', 'datasets[audio]'],
+        'class': None,
+        'name': _('Distill')
+    }
+}
+
+
+class Configuration:
+    def __init__(self, plugin: STTVoiceMessagesPlugin):
+        self._plugin = plugin
+        self._available_models: dict[
+            str, dict[str, typing.Union[list[str], Any, str]]] = {}
+        self.check_available_moduls()
+            
+    @property
+    def plugin(self) -> STTVoiceMessagesPlugin:
+        return self._plugin
+
+    @property
+    def available_models(self) -> dict[str, dict[str, typing.Union[list[str], Any, str]]]:
+        return self._available_models
+
+    def on_setting(self, value: Any, data: Any) -> None:
+        if isinstance(value, str):
+            value.strip()
+        log.debug('plugin config before:\n %s', self.plugin.config.data)
+        self.plugin.config[data] = value
+        log.debug('plugin config after:\n %s', self.plugin.config.data)
+
+    def on_set_model(self, value: Any, data: Any) -> None:
+        if isinstance(value, str):
+            value.strip()
+        log.debug('plugin config before:\n %s', self.plugin.config.data)
+        self.plugin.config['model_class'] = self._available_models[value][
+            'class']
+        self.on_setting(value, data)
+        log.debug('plugin config after:\n %s', self.plugin.config.data)
+
+    @staticmethod
+    def is_module_available(module: str) -> bool:
+        try:
+            __import__(module)
+            return True
+        except ModuleNotFoundError:
+            log.debug('Could not find module %s', module)
+            return False
+        except ImportError as ex:
+            log.debug(str(ex))
+            return False
+
+    def check_available_moduls(self):
+        for model in SUPPORTED_MODELS:
+            available = True
+            for modul in SUPPORTED_MODELS[model]['moduls']:
+                if not self.is_module_available(modul):
+                    available = False
+                    continue
+            if available:
+                self._available_models[model] = SUPPORTED_MODELS[model]
+
+        if (self.plugin.config.data['model_class'] is None
+                and len(self._available_models) > 0):
+            model = list(self._available_models)[0]
+            self.on_set_model(model, 'model')
+            log.debug('Choose first available model!')
+        else:
+            log.debug('Available model already chosen!')
+
+        log.debug('models = %s', self._available_models)
+
+
+
 class PreferenceBox(SettingsBox):
     def __init__(self, settings: list[Setting]) -> None:
         SettingsBox.__init__(self, None)
@@ -52,7 +143,7 @@ class PreferenceBox(SettingsBox):
 
 
 class STTVoiceMessagesConfigDialog(Gtk.ApplicationWindow):
-    def __init__(self, plugin: STTVoiceMessagesPlugin, parent: Gtk.Window) -> None:
+    def __init__(self, config: Configuration, parent: Gtk.Window) -> None:
         Gtk.ApplicationWindow.__init__(self)
 
         self.set_application(app.app)
@@ -72,45 +163,47 @@ class STTVoiceMessagesConfigDialog(Gtk.ApplicationWindow):
         self._ui.grid.attach(side_bar_switcher, 0, 0, 1, 1)
         self.add(self._ui.grid)
 
+        self.config = config
+        self.plugin = self.config.plugin
+
         prefs: list[tuple[str, type[PreferenceBox]]] = [
             ('stt_behaviour', self.STTBehaviour),
             ('models', self.Models),
             ('whisper_general', self.OpenAIWhisperGeneral),
         ]
-
         self._add_prefs(prefs)
+
         self.show_all()
 
     class STTBehaviour(PreferenceBox):
-        def __init__(self, config: Configuration) -> None:
+        def __init__(self, config_dialog: STTVoiceMessagesConfigDialog) -> None:
 
             settings = [
                 Setting(SettingKind.SWITCH,
                         _('Auto Transcribe'),
                         SettingType.VALUE,
-                        value=config.plugin.config['auto_transcribe'],
+                        value=config_dialog.plugin.config['auto_transcribe'],
                         data='auto_transcribe',
-                        callback=config.on_setting)
+                        callback=config_dialog.config.on_setting)
             ]
 
             PreferenceBox.__init__(self, settings)
 
     class Models(PreferenceBox):
-        def __init__(self, config: Configuration) -> None:
+        def __init__(self, config_dialog: STTVoiceMessagesConfigDialog) -> None:
             models: list[tuple[str, str]] = []
-            for key, value in config.available_models.items():
-                assert value['name'] is str
+            for key, value in config_dialog.config.available_models.items():
                 models.append(
-                    (key, value['name'])
+                    (key, str(value['name']))
                 )
 
             settings = [
                 Setting(SettingKind.COMBO,
                         _('Speech To Text Model'),
                         SettingType.VALUE,
-                        value=config.plugin.config['model'],
+                        value=config_dialog.plugin.config['model'],
                         data='model',
-                        callback=config.on_set_model,
+                        callback=config_dialog.config.on_set_model,
                         props={'combo_items': models},
                         desc=_('Choose Model to use')),
             ]
@@ -118,23 +211,23 @@ class STTVoiceMessagesConfigDialog(Gtk.ApplicationWindow):
             PreferenceBox.__init__(self, settings)
 
     class OpenAIWhisperGeneral(PreferenceBox):
-        def __init__(self, config: Configuration) -> None:
+        def __init__(self, config_dialog: STTVoiceMessagesConfigDialog) -> None:
 
             settings = [
                 Setting(SettingKind.POPOVER,
                         _('Language Model Size'),
                         SettingType.VALUE,
-                        value=config.plugin.config['whisperai_model_size'],
+                        value=config_dialog.plugin.config['whisperai_model_size'],
                         data='whisperai_model_size',
-                        callback=config.on_setting,
+                        callback=config_dialog.config.on_setting,
                         props={'entries': whisper.available_models()}),
 
                 Setting(SettingKind.SWITCH,
                         _('Translate'),
                         SettingType.VALUE,
-                        value=config.plugin.config['whisperai_translate'],
+                        value=config_dialog.plugin.config['whisperai_translate'],
                         data='whisperai_translate',
-                        callback=config.on_setting)
+                        callback=config_dialog.config.on_setting)
             ]
 
             PreferenceBox.__init__(self, settings)
diff --git a/stt_voice_messages/gtk/sttbox.py b/stt_voice_messages/gtk/sttbox.py
index c9b50ff..995ab3f 100644
--- a/stt_voice_messages/gtk/sttbox.py
+++ b/stt_voice_messages/gtk/sttbox.py
@@ -13,14 +13,15 @@
 # You should have received a copy of the GNU General Public License
 # along with Gajim. If not, see <http://www.gnu.org/licenses/>.
 
-from gi.repository import Gtk
 import logging
 
-from .. import helper
+from gi.repository import Gtk
 
 from gajim.plugins.gajimplugin import GajimPluginConfig
 from gajim.plugins.plugins_i18n import _
 
+from .. import helper
+
 log = logging.getLogger('gajim.p.stt_voice_messages_sttbox')
 
 class STTBox(Gtk.Box):
@@ -52,9 +53,6 @@ class STTBox(Gtk.Box):
 
         self.show_all()
 
-    #def update_config(self, config: GajimPluginConfig):
-    #    self._model = config.data['class']()
-
     def _on_transcribe_clicked(self, _button: Gtk.Button) -> None:
         log.debug('config.data = %s', self._config.data)
         model_class = self._config.data['model_class']
diff --git a/stt_voice_messages/stt_voice_messages.py b/stt_voice_messages/stt_voice_messages.py
index f761c1e..5b78d35 100644
--- a/stt_voice_messages/stt_voice_messages.py
+++ b/stt_voice_messages/stt_voice_messages.py
@@ -15,17 +15,13 @@
 
 from __future__ import annotations
 
-import logging
 from functools import partial
-from pathlib import Path
-
-from gi.repository import Gtk
 
 from gajim.plugins import GajimPlugin
 from gajim.plugins.plugins_i18n import _
 
+from .gtk.config_dialog import *
 from .gtk.sttbox import STTBox
-from .gtk.config_dialog import STTVoiceMessagesConfigDialog
 
 log = logging.getLogger('gajim.p.stt_voice_messages')
 
@@ -33,7 +29,9 @@ log = logging.getLogger('gajim.p.stt_voice_messages')
 class STTVoiceMessagesPlugin(GajimPlugin):
     def init(self) -> None:
         self.description = _('Transcribes voice messages to text.')
-        self.config_dialog = partial(STTVoiceMessagesConfigDialog, self)
+        self._config = Configuration(self)
+        self._config.check_available_moduls()
+        self.config_dialog = partial(STTVoiceMessagesConfigDialog, self._config)
 
         self.gui_extension_points = {
             'preview_audio': (self._on_preview_audio_created, None),