diff --git a/README.md b/README.md
index 83dc5a8..faf46cf 100644
--- a/README.md
+++ b/README.md
@@ -29,3 +29,6 @@ vrcdn = "vrcdn_stream_name"
 Instances can either be the URL or instance and world ID seperated out, the later taking priority over the former.
 
 Runs on port `6534`, on all interfaces. May be configurable in the future.
+
+You will need to set the `VRCHAT_AUTH_TOKEN` environment variable to authenticate with VRChat's API. This isn't technically
+recommended and a more robust authentication system (see: _correct_) should be considered for serious use (see: VEMS).