diff --git a/examples/self-hosted/src/PKPasses.ts b/examples/self-hosted/src/PKPasses.ts
index 368aa89..cb6e759 100644
--- a/examples/self-hosted/src/PKPasses.ts
+++ b/examples/self-hosted/src/PKPasses.ts
@@ -29,11 +29,14 @@
  * A feedback to Apple have been sent for this.
  */
 
+import { fileURLToPath } from "node:url";
+import path from "node:path";
+import { promises as fs } from "node:fs";
+import { PKPass } from "passkit-generator";
 import { app } from "./webserver.js";
 import { getCertificates } from "./shared.js";
-import { promises as fs } from "node:fs";
-import path from "node:path";
-import { PKPass } from "passkit-generator";
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
 
 // *************************** //
 // *** EXAMPLE FROM NOW ON *** //
diff --git a/examples/self-hosted/src/localize.ts b/examples/self-hosted/src/localize.ts
index 4eb87cf..6fff96e 100644
--- a/examples/self-hosted/src/localize.ts
+++ b/examples/self-hosted/src/localize.ts
@@ -5,10 +5,13 @@
  */
 
 import path from "node:path";
+import { fileURLToPath } from "node:url";
 import { PKPass } from "passkit-generator";
 import { app } from "./webserver.js";
 import { getCertificates } from "./shared.js";
 
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
 app.route("/localize/:modelName").get(async (request, response) => {
 	const passName =
 		request.params.modelName +
@@ -31,7 +34,12 @@ app.route("/localize/:modelName").get(async (request, response) => {
 					signerKeyPassphrase: certificates.signerKeyPassphrase,
 				},
 			},
-			request.body || request.params || request.query,
+			Object.assign(
+				{
+					serialNumber: Math.random().toString(36).substring(2, 15),
+				},
+				request.body || request.query || {},
+			),
 		);
 
 		// Italian, already has an .lproj which gets included...
diff --git a/examples/self-hosted/src/scratch.ts b/examples/self-hosted/src/scratch.ts
index 654d8a3..a15e2e3 100644
--- a/examples/self-hosted/src/scratch.ts
+++ b/examples/self-hosted/src/scratch.ts
@@ -5,10 +5,13 @@
 
 import path from "node:path";
 import { promises as fs } from "node:fs";
+import { fileURLToPath } from "node:url";
 import { PKPass } from "passkit-generator";
 import { app } from "./webserver.js";
 import { getCertificates } from "./shared.js";
 
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
 function getRandomColorPart() {
 	return Math.floor(Math.random() * 255);
 }
diff --git a/examples/self-hosted/src/setBarcodes.ts b/examples/self-hosted/src/setBarcodes.ts
index b620d98..54fed2b 100644
--- a/examples/self-hosted/src/setBarcodes.ts
+++ b/examples/self-hosted/src/setBarcodes.ts
@@ -10,9 +10,12 @@
 
 import { PKPass } from "passkit-generator";
 import path from "node:path";
+import { fileURLToPath } from "node:url";
 import { app } from "./webserver.js";
 import { getCertificates } from "./shared.js";
 
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
 app.route("/barcodes/:modelName").get(async (request, response) => {
 	const passName =
 		request.params.modelName +
diff --git a/examples/self-hosted/src/setExpirationDate.ts b/examples/self-hosted/src/setExpirationDate.ts
index 4c341c9..6670af2 100644
--- a/examples/self-hosted/src/setExpirationDate.ts
+++ b/examples/self-hosted/src/setExpirationDate.ts
@@ -8,10 +8,13 @@
  */
 
 import path from "node:path";
+import { fileURLToPath } from "node:url";
 import { PKPass } from "passkit-generator";
 import { app } from "./webserver.js";
 import { getCertificates } from "./shared.js";
 
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
 app.route("/expirationDate/:modelName").get(async (request, response) => {
 	if (!request.query.fn) {
 		response.send(