diff --git a/README.md b/README.md
index 6716c3b..7a39bb1 100644
--- a/README.md
+++ b/README.md
@@ -89,7 +89,8 @@ playwriter -e "await state.dbg.setBreakpoint({ file: state.scripts[0].url, line:
 **Live edit page code:**
 ```bash
 playwriter -e "state.cdp = await getCDPSession({ page }); state.editor = createEditor({ cdp: state.cdp }); await state.editor.enable()"
-playwriter -e "await state.editor.edit({ url: 'app.js', oldString: 'DEBUG=false', newString: 'DEBUG=true' })"
+playwriter -e "state.matches = await state.editor.grep({ regex: /DEBUG/ }); console.log(state.matches)"
+playwriter -e "await state.editor.edit({ url: state.matches[0].url, oldString: 'const DEBUG = false', newString: 'const DEBUG = true' })"
 ```
 
 **Screenshot with labels:**