diff --git a/.coveragerc b/.coveragerc
index 4cdb448..9843aa0 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -1,6 +1,6 @@
 [run]
 omit =
-  whisper_cpp.py
+  buzz/whisper_cpp.py
   *_test.py
 
 [html]
diff --git a/Makefile b/Makefile
index 9ad05c1..c397fdf 100644
--- a/Makefile
+++ b/Makefile
@@ -43,18 +43,18 @@ endif
 
 clean:
 	rm -f $(LIBWHISPER)
-	rm -f whisper_cpp.py
+	rm -f buzz/whisper_cpp.py
 	rm -rf dist/* || true
 
-test: whisper_cpp.py
+test: buzz/whisper_cpp.py
 	pytest --cov --cov-report=html
 
-dist/Buzz dist/Buzz.app: whisper_cpp.py
+dist/Buzz dist/Buzz.app: buzz/whisper_cpp.py
 	pyinstaller --noconfirm Buzz.spec
 
 version:
 	poetry version ${version}
-	echo "VERSION = \"${version}\"" > __version__.py
+	echo "VERSION = \"${version}\"" > buzz/__version__.py
 	sed -i "s/version=.*,/version=\'${version_escaped}\',/" Buzz.spec
 
 CMAKE_FLAGS=
@@ -79,8 +79,8 @@ $(LIBWHISPER):
 	cp whisper.cpp/build/$(LIBWHISPER) . || true
 	cp whisper.cpp/build/bin/Debug/$(LIBWHISPER) . || true
 
-whisper_cpp.py: $(LIBWHISPER)
-	ctypesgen ./whisper.cpp/whisper.h -l$(LIBWHISPER) -o whisper_cpp.py
+buzz/whisper_cpp.py: $(LIBWHISPER)
+	ctypesgen ./whisper.cpp/whisper.h -l$(LIBWHISPER) -o buzz/whisper_cpp.py
 
 staple_app_mac:
 	xcrun stapler staple ${mac_app_path}
diff --git a/buzz/__init__.py b/buzz/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/__version__.py b/buzz/__version__.py
similarity index 100%
rename from __version__.py
rename to buzz/__version__.py
diff --git a/conn.py b/buzz/conn.py
similarity index 100%
rename from conn.py
rename to buzz/conn.py
diff --git a/gui.py b/buzz/gui.py
similarity index 99%
rename from gui.py
rename to buzz/gui.py
index 18eb08e..8d3cc6d 100644
--- a/gui.py
+++ b/buzz/gui.py
@@ -20,10 +20,10 @@ from PyQt6.QtWidgets import (QApplication, QCheckBox, QComboBox, QDialog,
 from requests import get
 from whisper import tokenizer
 
-from __version__ import VERSION
-from transcriber import FileTranscriber, OutputFormat, RecordingTranscriber
-from whispr import LOADED_WHISPER_DLL, Task
-from model_loader import ModelLoader
+from .__version__ import VERSION
+from .transcriber import FileTranscriber, OutputFormat, RecordingTranscriber
+from .whispr import LOADED_WHISPER_DLL, Task
+from .model_loader import ModelLoader
 
 APP_NAME = 'Buzz'
 
diff --git a/model_loader.py b/buzz/model_loader.py
similarity index 100%
rename from model_loader.py
rename to buzz/model_loader.py
diff --git a/transcriber.py b/buzz/transcriber.py
similarity index 98%
rename from transcriber.py
rename to buzz/transcriber.py
index 3bcbd64..62827ad 100644
--- a/transcriber.py
+++ b/buzz/transcriber.py
@@ -18,8 +18,9 @@ import stable_whisper
 import whisper
 from sounddevice import PortAudioError
 
-from conn import pipe_stderr, pipe_stdout
-from whispr import Segment, Task, WhisperCpp, read_progress, whisper_cpp_params
+from .conn import pipe_stderr, pipe_stdout
+from .whispr import (Segment, Task, WhisperCpp, read_progress,
+                     whisper_cpp_params)
 
 
 class RecordingTranscriber:
diff --git a/whispr.py b/buzz/whispr.py
similarity index 98%
rename from whispr.py
rename to buzz/whispr.py
index 3f221ea..d353022 100644
--- a/whispr.py
+++ b/buzz/whispr.py
@@ -14,7 +14,7 @@ import whisper
 # the DLL in some envs is fixed.
 LOADED_WHISPER_DLL = False
 try:
-    import whisper_cpp
+    import buzz.whisper_cpp as whisper_cpp
     LOADED_WHISPER_DLL = True
 except ImportError:
     logging.exception('')
diff --git a/main.py b/main.py
index cf73788..b780888 100644
--- a/main.py
+++ b/main.py
@@ -34,6 +34,6 @@ if __name__ == "__main__":
         level=logging.DEBUG,
         format="[%(asctime)s] %(module)s.%(funcName)s:%(lineno)d %(levelname)s -> %(message)s")
 
-    from gui import Application
+    from buzz.gui import Application
     app = Application()
     sys.exit(app.exec())
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/gui_test.py b/tests/gui_test.py
similarity index 96%
rename from gui_test.py
rename to tests/gui_test.py
index 2e78be8..8ad59be 100644
--- a/gui_test.py
+++ b/tests/gui_test.py
@@ -5,11 +5,12 @@ from unittest.mock import patch
 import sounddevice
 from PyQt6.QtCore import Qt
 
-from gui import (Application, AudioDevicesComboBox,
-                 DownloadModelProgressDialog, FileTranscriberWidget,
-                 LanguagesComboBox, MainWindow, OutputFormatsComboBox, Quality, Settings, AboutDialog,
-                 QualityComboBox, TranscriberProgressDialog)
-from transcriber import OutputFormat
+from buzz.gui import (AboutDialog, Application, AudioDevicesComboBox,
+                      DownloadModelProgressDialog, FileTranscriberWidget,
+                      LanguagesComboBox, MainWindow, OutputFormatsComboBox,
+                      Quality, QualityComboBox, Settings,
+                      TranscriberProgressDialog)
+from buzz.transcriber import OutputFormat
 
 
 class TestApplication:
diff --git a/transcriber_test.py b/tests/transcriber_test.py
similarity index 96%
rename from transcriber_test.py
rename to tests/transcriber_test.py
index ac34420..cc2d54d 100644
--- a/transcriber_test.py
+++ b/tests/transcriber_test.py
@@ -1,4 +1,3 @@
-import logging
 import os
 import pathlib
 import tempfile
@@ -6,10 +5,10 @@ import time
 
 import pytest
 
-from model_loader import ModelLoader
-from transcriber import (FileTranscriber, OutputFormat, RecordingTranscriber,
-                         to_timestamp)
-from whispr import Task
+from buzz.model_loader import ModelLoader
+from buzz.transcriber import (FileTranscriber, OutputFormat,
+                              RecordingTranscriber, to_timestamp)
+from buzz.whispr import Task
 
 
 def get_model_path(model_name: str, use_whisper_cpp: bool) -> str: