diff --git a/libcontainer/README.md b/libcontainer/README.md
index 91e44374e..6331010ff 100644
--- a/libcontainer/README.md
+++ b/libcontainer/README.md
@@ -219,6 +219,9 @@ container.Resume()
 
 // send signal to container's init process.
 container.Signal(signal)
+
+// update container resource constraints.
+container.Set(config)
 ```