diff --git a/tools/importer/README.md b/tools/importer/README.md
index 1ef476ee21..e5d2ca1cce 100644
--- a/tools/importer/README.md
+++ b/tools/importer/README.md
@@ -48,3 +48,8 @@ Note: You must resolve any conflicts that arise during this cherry-pick process.
 ### Input to importer.py
 1. Repository: -r <repo_path> ( Example: CMSIS / Mbed-tls)
 2. `repo`_importer.json: -c <json_file>  (Example: cmsis_importer.json)
+
+For example the command below can be used to update CMSIS:
+`python tools\importer\importer.py -c tools\importer\cmsis_importer.json -r <path to cmsis repo>`
+
+Note: This script must be run from the mbed-os directory to work correctly.