diff --git a/src/routers/upload.ts b/src/routers/upload.ts
index 502822a..36aab91 100644
--- a/src/routers/upload.ts
+++ b/src/routers/upload.ts
@@ -48,7 +48,7 @@ router.use('/', (err: ErrWrap, _req: Request, res: Response, next: Function) =>
 router.post('/', (req: Request, res: Response, next: Function) => {
 	// Load overrides
 	const trueDomain = getTrueDomain(req.headers['x-ass-domain']);
-	const generator = req.headers['x-ass-access'] || resourceIdType;
+	const generator = req.headers['x-ass-access']?.toString() || resourceIdType;
 
 	// Save domain with file
 	req.file!.domain = `${getTrueHttp()}${trueDomain}`;
@@ -80,7 +80,7 @@ router.post('/', (req: Request, res: Response, next: Function) => {
 	let resourceId = '';
 
 	// Function to call to generate a fresh ID. Used for multiple attempts in case an ID is already taken
-	const gen = () => generateId(generator, resourceIdSize, req.headers['x-ass-gfycat'] || gfyIdSize, req.file!.originalname);
+	const gen = () => generateId(generator, resourceIdSize, parseInt(req.headers['x-ass-gfycat']?.toString() || gfyIdSize.toString()), req.file!.originalname);
 
 	// Keeps track of the number of attempts in case all ID's are taken
 	const attempts = {