diff --git a/README.md b/README.md
index 2607658..5ee5dc8 100644
--- a/README.md
+++ b/README.md
@@ -29,13 +29,13 @@ with a reserved port.
 ### Upgrade
 
 ```sh
-pip upgrade sms-handler
+pip upgrade --index-url https://code.philo.ydns.eu/api/packages/philorg/pypi/simple sms-handler
 ```
 
 or:
 
 ```sh
-pipx upgrade sms-handler
+pipx upgrade --index-url https://code.philo.ydns.eu/api/packages/philorg/pypi/simple sms-handler
 ```
 
 ## Configuration