diff --git a/lib/config.js b/lib/config.js
index 37968269..428e5466 100644
--- a/lib/config.js
+++ b/lib/config.js
@@ -25,7 +25,7 @@ const JAMBONES_MYSQL_USER = process.env.JAMBONES_MYSQL_USER;
 const JAMBONES_MYSQL_PASSWORD = process.env.JAMBONES_MYSQL_PASSWORD;
 const JAMBONES_MYSQL_DATABASE = process.env.JAMBONES_MYSQL_DATABASE;
 const JAMBONES_MYSQL_PORT = parseInt(process.env.JAMBONES_MYSQL_PORT, 10) || 3306;
-const JAMBONES_MYSQL_REFRESH_TTL = process.env.JAMBONES_MYSQL_REFRESH_TTL;
+const JAMBONES_MYSQL_REFRESH_TTL = parseInt(process.env.JAMBONES_MYSQL_REFRESH_TTL, 10) || 0;
 const JAMBONES_MYSQL_CONNECTION_LIMIT = parseInt(process.env.JAMBONES_MYSQL_CONNECTION_LIMIT, 10) || 10;
 
 /* redis */