diff --git a/core/taiko_genesis.go b/core/taiko_genesis.go
index 586025ccd8..d08f9d8b8f 100644
--- a/core/taiko_genesis.go
+++ b/core/taiko_genesis.go
@@ -18,7 +18,7 @@ var (
 	InternalDevnetPacayaBlock = new(big.Int).SetUint64(10)
 	PreconfDevnetPacayaBlock  = common.Big0
 	HeklaPacayaBlock          = new(big.Int).SetUint64(1_299_888)
-	MainnetPacayaBlock        = new(big.Int).SetUint64(999_999_999_999)
+	MainnetPacayaBlock        = new(big.Int).SetUint64(1_166_000)
 )
 
 // TaikoGenesisBlock returns the Taiko network genesis block configs.