diff --git a/build/params_testground.go b/build/params_testground.go
index e139b6921..41c46d41e 100644
--- a/build/params_testground.go
+++ b/build/params_testground.go
@@ -107,8 +107,8 @@ var (
 
 	GenesisNetworkVersion = network.Version0
 
-	NewestNetworkVersion       = network.Version14
-	ActorUpgradeNetworkVersion = network.Version4
+	NewestNetworkVersion       = network.Version15
+	ActorUpgradeNetworkVersion = network.Version15
 
 	Devnet      = true
 	ZeroAddress = MustParseAddress("f3yaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaby2smx7a")