diff --git a/README.md b/README.md
index b495301..fa9a8e6 100644
--- a/README.md
+++ b/README.md
@@ -160,7 +160,7 @@ codex plugin marketplace add GoogleCloudPlatform/data-agent-kit
 **2. Install the plugin:**
 
 ```bash
-codex plugin install knowledge-catalog@data-agent-kit
+codex plugin add knowledge-catalog@data-agent-kit
 ```
 
 **3. Set env vars:**