Fixed readme error
diff --git a/README.md b/README.md
index 02dc995..88b9c7f 100644
--- a/README.md
+++ b/README.md
@@ -20,9 +20,9 @@
This was added to distinguish tcp, udp and tcp-proxy service operating on the same port.
Without this change, it would not be possible to map, for example, a service that runs on both TCP and UDP port 8000.
-:warning: **If you have existing rules, remove them before upgrading and them back afterwards.**
+:warning: **If you have existing rules, remove them before upgrading and add them back afterwards.**
-If you don't do this, you need to manually remove the rules in CloudStack later.
+If you don't do this, you need to manually remove the rules in CloudStack when they are replaced.
### Metadata
