diff --git a/src/router.ts b/src/router.ts
index 3b2ed68..86b2a10 100644
--- a/src/router.ts
+++ b/src/router.ts
@@ -23,6 +23,7 @@ router.use("/:target", async (req: Request, res: Response, next: NextFunction) =
     // CORS
     res.setHeader("Access-Control-Allow-Origin", target.origin);
     res.setHeader("Access-Control-Allow-Method", "POST");
+    res.setHeader("Access-Control-Allow-Headers", "*");
 
     // Check origin
     if(target.origin !== req.header("origin")) {
@@ -38,6 +39,10 @@ router.use("/:target", async (req: Request, res: Response, next: NextFunction) =
         }
     }
 
+    if(req.method === "OPTIONS") {
+        return res.status(200).end();
+    }
+
     return next();
 
 });