diff --git a/whispersubs/__main__.py b/whispersubs/__main__.py
index f21c9ef..991a50e 100644
--- a/whispersubs/__main__.py
+++ b/whispersubs/__main__.py
@@ -10,7 +10,7 @@
 from itertools import chain
 from pathlib import Path
 from time import monotonic_ns
-from typing import TYPE_CHECKING, ContextManager, Iterable, Iterator, Sequence
+from typing import TYPE_CHECKING, Any, ClassVar, ContextManager, Iterable, Iterator, Sequence
 
 import av
 import blessed
@@ -29,10 +29,10 @@
     import nvidia.cublas.lib
     import nvidia.cudnn.lib
 except ImportError:
-    warnings.warn("NVIDIA CUDA libraries not found, inference will run on CPU only.")
+    warnings.warn("NVIDIA CUDA libraries not found, inference will run on CPU only.", stacklevel=1)
 else:
-    _cublas_libs = os.path.dirname(nvidia.cublas.lib.__file__)
-    _cudnn_libs = os.path.dirname(nvidia.cudnn.lib.__file__)
+    _cublas_libs = os.path.dirname(nvidia.cublas.lib.__file__)  # noqa: PTH120
+    _cudnn_libs = os.path.dirname(nvidia.cudnn.lib.__file__)  # noqa: PTH120
     _ld_library_path = os.environ.get("LD_LIBRARY_PATH", "")
     if _cudnn_libs not in _ld_library_path or _cublas_libs not in _ld_library_path:
         os.environ["LD_LIBRARY_PATH"] = ":".join([
@@ -41,7 +41,7 @@
             *_ld_library_path.split(":"),
         ])
         # restart the script with the updated environment
-        os.execve(sys.executable, [sys.executable] + sys.argv, os.environ)
+        os.execve(sys.executable, [sys.executable, *sys.argv], os.environ)  # noqa: S606
 
 
 _logger = logging.getLogger(__name__)
@@ -82,7 +82,7 @@ def extract_audio(file: Path) -> Iterator[tuple[NDArray[np.float32], float]]:
             yield frame_np[0], duration
 
 
-def transcribe_segments(
+def transcribe_segments(  # noqa: PLR0914
     audio_chunks: Iterable[NDArray[np.float32]],
     *,
     model_size: str = DEFAULT_WHISPER_MODEL_SIZE,
@@ -109,7 +109,7 @@ def transcribe_segments(
     if progress:
 
         @contextlib.contextmanager
-        def pbar_cm():
+        def pbar_cm() -> Iterator[enlighten.Counter]:
             manager = enlighten.get_manager(set_scroll=False)
             counter = manager.counter(
                 total=total_duration,
@@ -136,11 +136,12 @@ def pbar_cm():
     _logger.log(logging.DEBUG if progress else logging.INFO, "Transcribing audio stream")
     pbar: enlighten.Counter | None
     with pbar_context as pbar:
+        audio_chunks_iterator: Iterator[NDArray[np.float32]] = iter(audio_chunks)
         last_chunk: bool = False
         start_t: int = monotonic_ns()
         while True:
             try:
-                chunk = next(audio_chunks)
+                chunk = next(audio_chunks_iterator)
             except StopIteration:
                 last_chunk = True
             else:
@@ -211,9 +212,9 @@ def create_subtitles(
     """
     Create a subtitle file from the given segments.
     """
-    segments_count = 0
-    index = 0
-    for segments_count, segment in enumerate(segments):
+    segments_count: int = 0
+    index: int = 0
+    for segments_count, segment in enumerate(segments):  # noqa: B007
         segment_start = segment.start
         segment_end = segment.end
         segment_duration = segment_end - segment_start
@@ -321,26 +322,28 @@ class LogFormatter(logging.Formatter):
     Custom formatter that adds colors using blessed and uses relative timestamps.
     """
 
-    COLOR_MAP = {
+    COLOR_MAP: ClassVar[dict[int, str]] = {
         logging.DEBUG: "blue",
         logging.INFO: "green",
         logging.WARNING: "yellow",
         logging.ERROR: "red",
         logging.CRITICAL: "bold_red",
     }
-    LEVEL_TAG_MAP = {
+    LEVEL_TAG_MAP: ClassVar[dict[int, str]] = {
         logging.DEBUG: "[D]",
         logging.INFO: "[I]",
         logging.WARNING: "[W]",
         logging.ERROR: "[E]",
         logging.CRITICAL: "[C]",
     }
-    FORMAT = "%(reltime)s %(color)s%(leveltag)s%(color_reset)s%(condname)s %(message)s"
+    FORMAT: ClassVar[str] = (
+        "%(reltime)s %(color)s%(leveltag)s%(color_reset)s%(condname)s %(message)s"
+    )
 
-    def __init__(self, *args, **kwargs):
-        super().__init__(fmt=self.FORMAT, *args, **kwargs)
+    def __init__(self, *args: Any, **kwargs: Any) -> None:
+        super().__init__(self.FORMAT, *args, **kwargs)
 
-    def format(self, record):
+    def format(self, record: logging.LogRecord) -> str:
         record.condname = f" ({record.name})" if record.name != "__main__" else ""
         record.leveltag = self.LEVEL_TAG_MAP.get(record.levelno, "[?]")
         record.color = getattr(term, self.COLOR_MAP.get(record.levelno, "white"))
@@ -349,7 +352,7 @@ def format(self, record):
         return super().format(record)
 
 
-def main():
+def main() -> None:
     logging.basicConfig(level=logging.INFO)
 
     parser = argparse.ArgumentParser(description="Transcribe audio/video files into subtitles")