diff --git a/lib/db.js b/lib/db.js
index d18bc7ebe2de3700eedfba7b5e3e5b5b71261829..d180921ff82499ab99fc3eec696389bf1a6d506c 100644
--- a/lib/db.js
+++ b/lib/db.js
@@ -1,5 +1,5 @@
-let mysql = require("mysql");
-let connection = mysql.createConnection({
+var mysql = require("mysql");
+var connection = mysql.createConnection({
   host: process.env.DB_HOST,
   user: process.env.DB_USER,
   password: process.env.DB_PASS,