diff --git a/docs/source/faq.rst b/docs/source/faq.rst
index 6531b99b..b728084c 100644
--- a/docs/source/faq.rst
+++ b/docs/source/faq.rst
@@ -128,10 +128,14 @@ How can I increase the maximum number of file descriptors?
 One of the first settings that usually needs to be bumped is the maximum number
 of open file descriptors for a given process. For the confused out there,
 remember that Unices treat sockets as files.
+
+.. warning::
 Considering non-privileged users are not able to relax the limit, you should
 firstly switch to root user, increase the limit, then run gunicorn. Using ``sudo
 ulimit`` would not take effect.
 
+Try systemd's service unit file, or an initscript which runs as root.
+
 How can I increase the maximum socket backlog?
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