diff --git a/build/params_calibnet.go b/build/params_calibnet.go
index 998cece42..b2206fa0d 100644
--- a/build/params_calibnet.go
+++ b/build/params_calibnet.go
@@ -89,8 +89,8 @@ const UpgradeWatermelonFixHeight = 1070494
 // 2023-11-21T13:00:00Z
 const UpgradeWatermelonFix2Height = 1108174
 
-// 2024-02-27T14:00:00Z
-const UpgradeDragonHeight = 1390534
+// 2024-03-06T14:00:00Z
+const UpgradeDragonHeight = 1413574
 
 // This epoch, 120 epochs after the "rest" of the nv22 upgrade, is when we switch to Drand quicknet
 const UpgradePhoenixHeight = UpgradeDragonHeight + 120
diff --git a/build/params_mainnet.go b/build/params_mainnet.go
index 325d7aeb6..51cb51ce3 100644
--- a/build/params_mainnet.go
+++ b/build/params_mainnet.go
@@ -99,11 +99,11 @@ const UpgradeThunderHeight = UpgradeLightningHeight + 2880*21
 // 2023-12-12T13:30:00Z
 const UpgradeWatermelonHeight = 3469380
 
-// ??????
-var UpgradeDragonHeight = abi.ChainEpoch(999999999999999)
+// 2024-04-02T14:00:00Z
+var UpgradeDragonHeight = abi.ChainEpoch(3792000)
 
 // This epoch, 120 epochs after the "rest" of the nv22 upgrade, is when we switch to Drand quicknet
-// ??????
+// 2024-04-02T15:00:00Z
 var UpgradePhoenixHeight = UpgradeDragonHeight + 120
 
 // This fix upgrade only ran on calibrationnet