diff --git a/supervisor.conf b/supervisor.conf
index 8bb6dc9..aa7f990 100644
--- a/supervisor.conf
+++ b/supervisor.conf
@@ -20,7 +20,7 @@ stderr_logfile=/dev/stderr
 stderr_logfile_maxbytes=0
 
 [eventlistener:feed-update]
-command=php7 -r 'while (true) { readline(); passthru('php7 /var/lib/tt-rss/update.php --daemon-loop'); }'
+command=php7 -r 'while (true) { readline(); passthru("php7 /var/lib/tt-rss/update.php --daemon-loop"); }'
 events=TICK_60
 autostart=true
 autorestart=true