diff --git a/lib/config.js b/lib/config.js
index c5a5287..60b5e46 100644
--- a/lib/config.js
+++ b/lib/config.js
@@ -9,7 +9,7 @@ const JAMBONES_HTTP_PROXY_PORT = process.env.JAMBONES_HTTP_PROXY_PORT;
 const JAMBONES_TTS_CACHE_DURATION_MINS =
   (parseInt(process.env.JAMBONES_TTS_CACHE_DURATION_MINS) || 4 * 60) * 60; // cache tts for 4 hours
 
-const TMP_FOLDER = '/tmp';
+const TMP_FOLDER = process.env.JAMBONES_TMP_FOLDER || '/tmp';
 
 const HTTP_TIMEOUT = 5000;