diff --git a/.env.example b/.env.example
index e27e100..ff79c6c 100644
--- a/.env.example
+++ b/.env.example
@@ -1,3 +1,4 @@
 MIGRATE_TXT="migrate.txt"
 DB_FILE_NAME="db.sqlite3"
-MAILCONNECT_ROOT_DIR="/app"
\ No newline at end of file
+MAILCONNECT_ROOT_DIR="/app"
+PORT=3000
\ No newline at end of file
diff --git a/src/server.ts b/src/server.ts
index f3cd026..9c7d93e 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -46,7 +46,7 @@ app.post("/accounts/update/password", updatePassword);
 app.post("/accounts/add", addAccount);
 app.post("/accounts/delete", deleteAccount);
 
-const PORT = 3000;
+const PORT = process.env.PORT || 3000;
 app.listen(PORT, () => {
   figlet('mail-connect', (err, data) => {
     if (err) {