diff --git a/README.md b/README.md
index 8067b82..6a56367 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 [![listmonk-logo](https://user-images.githubusercontent.com/547147/134940003-1de03d83-8c7b-459b-8056-baa8d5f3b448.png)](https://listmonk.app)
 
-listmonk is a standalone, self-hosted, newsletter and mailing list manager. It is fast, feature-rich, and packed into a single binary. It uses a PostgreSQL database as its data store.
+listmonk is a standalone, self-hosted, newsletter and mailing list manager. It is fast, feature-rich, and packed into a single binary. It uses a PostgreSQL (⩾ v9.4) database as its data store.
 
 [![listmonk-dashboard](https://user-images.githubusercontent.com/547147/134939475-e0391111-f762-44cb-b056-6cb0857755e3.png)](https://listmonk.app)