diff --git a/src/PrometheusMiddleware.php b/src/PrometheusMiddleware.php
index 8e3466a..a5fde04 100644
--- a/src/PrometheusMiddleware.php
+++ b/src/PrometheusMiddleware.php
@@ -94,7 +94,7 @@ public function handle(Envelope $envelope, StackInterface $stack): Envelope
         $stamp = $envelope->last(BusNameStamp::class);
 
         if (true === $stamp instanceof BusNameStamp) {
-            $busName = str_replace('.', '_', $stamp->getBusName());
+            $busName = str_replace(['.', '-'], '_', $stamp->getBusName());
         }
 
         $counter = $this->getCounter(