From d46844bd44eef6a06a813ee810b413e0718a2fec Mon Sep 17 00:00:00 2001
From: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>
Date: Thu, 3 Dec 2020 13:07:31 -0800
Subject: [PATCH] Update _index.md

---
 docs/sources/configuration/_index.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/docs/sources/configuration/_index.md b/docs/sources/configuration/_index.md
index 764238240fb5..959fed4d26ff 100644
--- a/docs/sources/configuration/_index.md
+++ b/docs/sources/configuration/_index.md
@@ -66,6 +66,8 @@ non-list parameters the value is set to the specified default.
 
 ### Use environment variables in the configuration
 
+> **Note:** This feature is only available in Loki 2.1+.
+
 You can use environment variable references in the configuration file to set values that need to be configurable during deployment.
 To do this, use: