diff --git a/cloud-sql/sqlserver/mssql/server.js b/cloud-sql/sqlserver/mssql/server.js
index c7ad78e1ab9..f08a014ed2d 100644
--- a/cloud-sql/sqlserver/mssql/server.js
+++ b/cloud-sql/sqlserver/mssql/server.js
@@ -192,4 +192,9 @@ const server = app.listen(PORT, () => {
   console.log('Press Ctrl+C to quit.');
 });
 
+process.on('unhandledRejection', err => {
+  console.error(err);
+  process.exit(1);
+});
+
 module.exports = server;