--- a/docs/src/lock.md	Tue Oct 03 14:59:35 2017 +0200
+++ b/docs/src/lock.md	Tue Oct 03 16:59:39 2017 +0200
@@ -12,6 +12,8 @@
 
 **`-c`** enable file name and path decryption
 
+**`-T <seconds>`** specify the lock token timeout in seconds
+
 ### Example 1: lock resource and use the lock token
 
 	$ dav lock myserv/resource