diff --git a/core/taiko_genesis.go b/core/taiko_genesis.go
index d8466469523f..ed114eacd24d 100644
--- a/core/taiko_genesis.go
+++ b/core/taiko_genesis.go
@@ -11,7 +11,7 @@ import (
 
 var (
 	InternalDevnetOntakeBlock = new(big.Int).SetUint64(2)
-	HeklaOntakeBlock          = new(big.Int).SetUint64(793_000)
+	HeklaOntakeBlock          = new(big.Int).SetUint64(840_512)
 	// TODO: update this value when mainnet fork height is decided
 	MainnetOntakeBlock = new(big.Int).SetUint64(9_000_000)
 )