diff --git a/data/part-4/2-messaging-systems.md b/data/part-4/2-messaging-systems.md
index a25f60d6..c0a98c6f 100644
--- a/data/part-4/2-messaging-systems.md
+++ b/data/part-4/2-messaging-systems.md
@@ -223,7 +223,7 @@ metrics:
 Now we are ready to upgrade the chart:
 
 ```bash
-helm upgrade -f myvalyes.yaml my-nats oci://registry-1.docker.io/bitnamicharts/nats
+helm upgrade -f myvalues.yaml my-nats oci://registry-1.docker.io/bitnamicharts/nats
 ```
 
 We can confirm that the ServiceMonitor _my-nats-metrics_ is indeed created: