diff --git a/setup.sh b/setup.sh
index 7843efa..09fcbe6 100644
--- a/setup.sh
+++ b/setup.sh
@@ -1,4 +1,4 @@
-apt-get install python python-all-dev python-pip build-essential swig git libpulse-dev libasound2-dev python3-numpy python3-scipy ffmpeg
+apt-get install python python-all-dev python-pip build-essential swig git libpulse-dev libasound2-dev python3-numpy python3-scipy ffmpeg sox
 pip3 install wheel
 pip3 install google-cloud-speech
 pip3 install pocketsphinx