diff --git a/cmd/network.go b/cmd/network.go
index dc5e446..8bcbe5b 100644
--- a/cmd/network.go
+++ b/cmd/network.go
@@ -164,8 +164,8 @@ func newNetworkCmd(c *config) *cobra.Command {
 	allocateCmd.Flags().BoolP("dmz", "", false, "use this private network as dmz. [optional]")
 	allocateCmd.Flags().BoolP("shared", "", false, "shared allows usage of this private network from other networks")
 	allocateCmd.Flags().StringP("addressfamily", "", "", "addressfamily of the network to acquire  [optional]")
-	allocateCmd.Flags().Int64P("ipv4length", "", 22, "ipv4 bitlength of network to create. [optional]")
-	allocateCmd.Flags().Int64P("ipv6length", "", 64, "ip6 bitlength of network to create. [optional]")
+	allocateCmd.Flags().Int64P("ipv4-prefix-length", "", 0, "ipv4 prefix bit length of network to create, defaults to default child prefix length of the parent network. [optional]")
+	allocateCmd.Flags().Int64P("ipv6-prefix-length", "", 0, "ipv6 prefix bit length of network to create, defaults to default child prefix length of the parent network. [optional]")
 	genericcli.Must(allocateCmd.RegisterFlagCompletionFunc("project", c.comp.ProjectListCompletion))
 	genericcli.Must(allocateCmd.RegisterFlagCompletionFunc("partition", c.comp.PartitionListCompletion))
 	genericcli.Must(allocateCmd.RegisterFlagCompletionFunc("addressfamily", c.comp.NetworkAddressFamilyCompletion))