diff --git a/build/params_calibnet.go b/build/params_calibnet.go
index 996a5c92486..be16d08b94b 100644
--- a/build/params_calibnet.go
+++ b/build/params_calibnet.go
@@ -53,7 +53,7 @@ const UpgradeTurboHeight = 390
 
 const UpgradeHyperdriveHeight = 420
 
-const UpgradeChocolateHeight = 999999999
+const UpgradeChocolateHeight = 312746
 
 func init() {
 	policy.SetConsensusMinerMinPower(abi.NewStoragePower(32 << 30))