diff --git a/build/params_calibnet.go b/build/params_calibnet.go
index c940d58e4..5b2e43236 100644
--- a/build/params_calibnet.go
+++ b/build/params_calibnet.go
@@ -61,7 +61,8 @@ const UpgradeChocolateHeight = 312746
 // 2022-02-10T19:23:00Z
 const UpgradeOhSnapHeight = 682006
 
-var UpgradeSkyrHeight = abi.ChainEpoch(99999999999999)
+// 2022-06-16T17:30:00Z
+const UpgradeSkyrHeight = 1044780
 
 var SupportedProofTypes = []abi.RegisteredSealProof{
 	abi.RegisteredSealProof_StackedDrg32GiBV1,