diff --git a/docs/command-reference.md b/docs/command-reference.md
index 290a8812..fcd05d64 100644
--- a/docs/command-reference.md
+++ b/docs/command-reference.md
@@ -783,6 +783,20 @@ container volume delete vol1 vol2 vol3
 container volume delete --all
 ```
 
+### `container volume prune`
+
+Removes all volumes that have no container references. This includes volumes that are not attached to any running or stopped containers. The command reports the actual disk space reclaimed after deletion.
+
+**Usage**
+
+```bash
+container volume prune [--debug]
+```
+
+**Options**
+
+No options.
+
 ### `container volume list (ls)`
 
 Lists volumes.