diff --git a/src/Server.php b/src/Server.php
index ef69eeb..fe2c37c 100644
--- a/src/Server.php
+++ b/src/Server.php
@@ -104,6 +104,7 @@ public function serve(WorkerInterface $worker = null, callable $finalize = null)
         $worker ??= Worker::create();
 
         while (true) {
+            $e = null;
             $request = $worker->waitPayload();
 
             if ($request === null) {