diff --git a/build/params_testground.go b/build/params_testground.go
index 975c26599..de554f49e 100644
--- a/build/params_testground.go
+++ b/build/params_testground.go
@@ -82,8 +82,8 @@ var (
 		0: DrandMainnet,
 	}
 
-	NewestNetworkVersion       = network.Version2
-	ActorUpgradeNetworkVersion = network.Version3
+	NewestNetworkVersion       = network.Version4
+	ActorUpgradeNetworkVersion = network.Version4
 
 	Devnet = true
 )