diff --git a/runatlantis.io/docs/server-configuration.md b/runatlantis.io/docs/server-configuration.md
index 2c63af109..b85eea942 100644
--- a/runatlantis.io/docs/server-configuration.md
+++ b/runatlantis.io/docs/server-configuration.md
@@ -15,6 +15,10 @@ All flags can be specified as environment variables.
 1. Uppercase all the letters => `GH_USER`
 1. Prefix with `ATLANTIS_` => `ATLANTIS_GH_USER`
 
+::: warning NOTE
+To set a boolean flag use `true` or `false` as the value.
+:::
+
 ::: warning NOTE
 The flag `--atlantis-url` is set by the environment variable `ATLANTIS_ATLANTIS_URL` **NOT** `ATLANTIS_URL`.
 :::