diff --git a/index.mjs b/index.mjs
index e9499c9..f59f99f 100644
--- a/index.mjs
+++ b/index.mjs
@@ -25,7 +25,7 @@ fastify.post('/', function (request, reply) {
 })
 
 // Run the server!
-fastify.listen(process.env.PORT || 3000, function (err, address) {
+fastify.listen(process.env.PORT || 3000, '0.0.0.0', function (err, address) {
   if (err) {
     fastify.log.error(err)
     process.exit(1)