diff --git a/build/params_butterfly.go b/build/params_butterfly.go
index 3cdb3914f..fc16b8589 100644
--- a/build/params_butterfly.go
+++ b/build/params_butterfly.go
@@ -19,7 +19,7 @@ var DrandSchedule = map[abi.ChainEpoch]DrandEnum{
 	0: DrandMainnet,
 }
 
-const GenesisNetworkVersion = network.Version18
+const GenesisNetworkVersion = network.Version20
 
 var NetworkBundle = "butterflynet"
 var BundleOverrides map[actorstypes.Version]string
@@ -52,13 +52,11 @@ const UpgradeOhSnapHeight = -18
 const UpgradeSkyrHeight = -19
 const UpgradeSharkHeight = -20
 const UpgradeHyggeHeight = -21
+const UpgradeLightningHeight = -22
+const UpgradeThunderHeight = -23
 
-const UpgradeLightningHeight = 50
-
-const UpgradeThunderHeight = UpgradeLightningHeight + 360
-
-// ??????????
-const UpgradeWatermelonHeight = 999999999999999
+// 2023-07-19
+const UpgradeWatermelonHeight = 5760
 
 var SupportedProofTypes = []abi.RegisteredSealProof{
 	abi.RegisteredSealProof_StackedDrg512MiBV1,