diff --git a/src/server.mjs b/src/server.mjs
index 4e9ed82..21e4d0d 100644
--- a/src/server.mjs
+++ b/src/server.mjs
@@ -2,7 +2,7 @@ import { randomUUID } from 'node:crypto';
 import fs from 'node:fs';
 import http from 'node:http';
 import path from 'node:path';
-import { fileURLToPath, pathToFileURL } from 'node:url';
+import { fileURLToPath } from 'node:url';
 
 import { signPayload } from '../lib/signPayload.mjs';
 
@@ -190,8 +190,10 @@ export function createServer(options = {}) {
   });
 }
 
+const entryPath = process.argv[1] ? path.resolve(process.argv[1]) : '';
 const isMain =
-  process.argv[1] && pathToFileURL(path.resolve(process.argv[1])).href === import.meta.url;
+  entryPath !== '' &&
+  (fileURLToPath(import.meta.url) === entryPath || entryPath.endsWith(`${path.sep}server.mjs`));
 
 if (isMain) {
   const privateKeyPem = process.env.LICENSE_PRIVATE_KEY_PEM;