diff --git a/rackspace/objectstorage/v1/containers/delegate.go b/rackspace/objectstorage/v1/containers/delegate.go
index 293cbf1..77ed002 100644
--- a/rackspace/objectstorage/v1/containers/delegate.go
+++ b/rackspace/objectstorage/v1/containers/delegate.go
@@ -21,7 +21,7 @@
 // List is a function that retrieves containers associated with the account as
 // well as account metadata. It returns a pager which can be iterated with the
 // EachPage function.
-func List(c *gophercloud.ServiceClient, opts *os.ListOpts) pagination.Pager {
+func List(c *gophercloud.ServiceClient, opts os.ListOptsBuilder) pagination.Pager {
 	return os.List(c, opts)
 }
 
@@ -81,7 +81,7 @@
 
 // Update is a function that creates, updates, or deletes a container's
 // metadata.
-func Update(c *gophercloud.ServiceClient, containerName string, opts *os.UpdateOpts) os.UpdateResult {
+func Update(c *gophercloud.ServiceClient, containerName string, opts os.UpdateOptsBuilder) os.UpdateResult {
 	return os.Update(c, containerName, opts)
 }