diff --git a/.env.example b/.env.example
index 64b86041e..9e64828b5 100644
--- a/.env.example
+++ b/.env.example
@@ -4,9 +4,11 @@
 APP_KEY=SomeRandomString
 
 # Application URL
+# Remove the hash below and set a URL if using BookStack behind
+# a proxy, if using a third-party authentication option.
 # This must be the root URL that you want to host BookStack on.
 # All URL's in BookStack will be generated using this value.
-APP_URL=https://example.com
+#APP_URL=https://example.com
 
 # Database details
 DB_HOST=localhost