diff --git a/server/reflector/utils/audio_waveform.py b/server/reflector/utils/audio_waveform.py
index 8fd184a8..d9f6b05c 100644
--- a/server/reflector/utils/audio_waveform.py
+++ b/server/reflector/utils/audio_waveform.py
@@ -59,7 +59,7 @@ def get_audio_waveform(path: Path | str, segments_count: int = 256) -> list[int]
     digits = 2
     volumes = np.round(volumes / volumes.max(), digits)
 
-    return volumes
+    return volumes.tolist()
 
 
 if __name__ == "__main__":