diff --git a/chain/state/statetree.go b/chain/state/statetree.go
index 3142a07d8..c71473e8f 100644
--- a/chain/state/statetree.go
+++ b/chain/state/statetree.go
@@ -156,7 +156,7 @@ func VersionForNetwork(ver network.Version) (types.StateTreeVersion, error) {
 	case network.Version13, network.Version14, network.Version15, network.Version16, network.Version17:
 		return types.StateTreeVersion4, nil
 
-	case network.Version18, network.Version19, network.Version20:
+	case network.Version18, network.Version19, network.Version20, network.Version21:
 		return types.StateTreeVersion5, nil
 
 	default: