diff --git a/Path-Specific-Configuration.md b/Path-Specific-Configuration.md
index 3081f63..33e23a6 100644
--- a/Path-Specific-Configuration.md
+++ b/Path-Specific-Configuration.md
@@ -99,6 +99,8 @@ Usage of fs.configure:
         assign writes with this ttl
   -volumeGrowthCount int
         the number of physical volumes to add if no writable volumes
+  -worm
+    	worm mode, If true, a file can only be changed once, after which it becomes readonly and undeletable, see https://en.wikipedia.org/wiki/Write_once_read_many
 
 ```