diff --git a/README.md b/README.md
index cdf0461..9ad25fa 100644
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@@ -3,10 +3,14 @@
 Single file PHP that can serve as a JWT based authentication provider 
 to the [PHP-CRUD-API](https://github.com/mevdschee/php-crud-api) project.
 
+**NB: Stable "v1" branch is:**
+https://github.com/mevdschee/php-api-auth/tree/v1
+
 ## Requirements
 
   - PHP 7 or higher
 
 ## Installation
 
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