diff --git a/src/main.ts b/src/main.ts
index 0ef09d3..e30d44e 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -15,10 +15,10 @@ async function main(): Promise<void> {
         ["--no-frontend", "Do not start the frontend server"],
         ["--no-backend", "Do not start the backend server"],
         ["-d, --data-directory <path>", "Path to the data directory", "./data"],
-        ["-p, --port <port>", "Port to listen on", (port: any) => parseInt(port), 6969],
+        ["-p, --port <port>", "Port to listen on", (port: any) => parseInt(port) || port, 6969],
         ["--use-mysql", "Use MySQL for storage"],
         ["--mysql-host <host>", "MySQL host", "localhost"],
-        ["--mysql-port <port>", "MySQL port", (port: any) => parseInt(port), 3306],
+        ["--mysql-port <port>", "MySQL port", (port: any) => parseInt(port) || port, 3306],
         ["--mysql-user <user>", "MySQL user", "root"],
         ["--mysql-password <password>", "MySQL password", "root"],
         ["--mysql-database <database>", "MySQL database", "polls"],