diff --git a/core/interface.go b/core/interface.go
index 0dc6266..48eb7e9 100644
--- a/core/interface.go
+++ b/core/interface.go
@@ -212,7 +212,7 @@ type BlockContext struct {
 	Coinbase    Address
 	GasLimit    uint64
 	BlockNumber *big.Int
-	Time        uint64
+	Time        *big.Int
 	Difficulty  *big.Int
 	BaseFee     *big.Int
 }