diff --git a/README.md b/README.md
index 6a671e3..d17c90f 100644
--- a/README.md
+++ b/README.md
@@ -30,6 +30,7 @@
 | **PHP_TIMEZONE** | *optional* | UTC
 | **PHP_MEMORY_LIMIT** | *optional* | 256M
 | **MAX_UPLOAD** | *optional* | 128M
+| **UPDATE_INTERVAL** | *optional* | 300
 
 ### Volumes
 
diff --git a/update_status.sh b/update_status.sh
index 26b5bd1..8fdead6 100644
--- a/update_status.sh
+++ b/update_status.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-[ $UPDATE_INTERVAL -ge 1 ] || UPDATE_INTERVAL=30
+[ $UPDATE_INTERVAL -ge 1 ] || UPDATE_INTERVAL=300
 
 while [ true ]; do
 	/usr/local/bin/php /var/www/cron/status.cron.php