diff --git a/README.md b/README.md
index 95894d6..bdca464 100644
--- a/README.md
+++ b/README.md
@@ -82,8 +82,7 @@ Quicker to install — but the skill lives in the plugin cache, so edits to `ref
 
 **Codex:**
 ```
-/plugin marketplace add cathrynlavery/diagram-design
-/plugin install diagram-design@diagram-design
+npx skills add https://github.com/cathrynlavery/diagram-design --skill diagram-design
 ```
 
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