diff --git a/public/typo3conf/ext/ep_track/Classes/Middleware/TrackingMiddleware.php b/public/typo3conf/ext/ep_track/Classes/Middleware/TrackingMiddleware.php
index 7c89c189..c3c0b752 100644
--- a/public/typo3conf/ext/ep_track/Classes/Middleware/TrackingMiddleware.php
+++ b/public/typo3conf/ext/ep_track/Classes/Middleware/TrackingMiddleware.php
@@ -50,7 +50,7 @@ class TrackingMiddleware implements MiddlewareInterface
 
     const COOKIE_NAME = 'ep_trk';
     const COOKIE_TTL = 30;
-    const CODE_PATTERN = '([a-z]{4}|PA)\d{4}.*';
+    const CODE_PATTERN = '([a-z]{4}|PA)\d{4}';
 
     public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
     {