diff --git a/ethcore/res/ethereum/kovan.json b/ethcore/res/ethereum/kovan.json
index 1268de55f26..47f80082f17 100644
--- a/ethcore/res/ethereum/kovan.json
+++ b/ethcore/res/ethereum/kovan.json
@@ -19,7 +19,7 @@
 						"0x00a0a24b9f0e5ec7aa4c7389b8302fd0123194de"
 					]
 				},
-				"validateScoreTransition": 1000000,
+				"validateScoreTransition": 4301764,
 				"validateStepTransition": 1500000,
 				"maximumUncleCountTransition": 5067000,
 				"maximumUncleCount": 0