diff --git a/main.py b/main.py
index c73498a..9fa1b26 100644
--- a/main.py
+++ b/main.py
@@ -1,37 +1,26 @@
 #!/usr/bin/env python3
 
 import json
-import struct
 import sys
-import wave
-from io import BytesIO
 from urllib.request import Request, urlopen
 
 from scipy.io import wavfile
-from scipy.io.wavfile import read as read_wav
 
 
 def stt(wav_file: str, url: str) -> str:
-    print('Connecting to \'{}\'...'.format(url))
-    request = Request('{}/stt'.format(url), data=_load_wav(wav_file), headers={'Content-Type': 'audio/wav'})
+    print(f'Connecting to \'{url}\'...')
+    request = Request(f'{url}/stt', data=_load_wav(wav_file), headers={'Content-Type': 'audio/wav'})
     result = json.loads(urlopen(request).read().decode('utf-8'))
 
     if not ('code' in result and 'text' in result):
-        raise RuntimeError('Wrong reply from server: {}'.format(result))
-    return result['text'] if not result['code'] else 'Server error: [{code}]: {text}'.format(**result)
+        raise RuntimeError(f'Wrong reply from server: {result}')
+    return result.text if not result.code else f'Server error: [{result.text}]: {result.code}'
 
 
-def _load_wav(wav_file, convert_rate=16000, convert_width=2, channels=1):
+def _load_wav(wav_file):
     _check_wav(wav_file)
-    with wave.open(wav_file, 'rb') as in_:
-        src_data = in_.readframes(in_.getnframes())
-    with BytesIO() as file:
-        with wave.open(file, 'wb') as out:
-            out.setframerate(convert_rate)
-            out.setsampwidth(convert_width)
-            out.setnchannels(channels)
-            out.writeframes(src_data)
-        result = file.getvalue()
+    with open(wav_file, 'rb') as file:
+        result = file.read()
     return result
 
 
@@ -53,7 +42,7 @@ def _main():
         exit(1)
     file = sys.argv[1]
     server = 'http://127.0.0.1:8086' if len(sys.argv) < 3 else sys.argv[2]
-    print('Result: {}'.format(stt(file, server)))
+    print(f'Result: {stt(file, server)}')
 
 
 if __name__ == '__main__':