diff --git a/encode.py b/encode.py
index 81585ca..ae04b98 100755
--- a/encode.py
+++ b/encode.py
@@ -12,6 +12,7 @@ def encode(input_file, output_file):
             'ffmpeg',
             '-i', input_file,
             '-codec:a', 'libopus',
+            '-b:a', '128K',
             '-codec:v', 'libx264',
             '-preset', 'veryslow',
             '-qp', '23',