diff --git a/env.template b/env.template
index 8d779eb..47bada8 100644
--- a/env.template
+++ b/env.template
@@ -1,3 +1,5 @@
+# https://github.com/tootsuite/mastodon/blob/master/.env.production.sample
+
 SINGLE_USER_MODE=false
 
 LOCAL_DOMAIN=