diff --git a/core/genesis.go b/core/genesis.go
index 2e51d4fc5d..3f44588861 100644
--- a/core/genesis.go
+++ b/core/genesis.go
@@ -353,12 +353,12 @@ func DefaultTestnetGenesisBlock() *Genesis {
 func DefaultCallistoTestnetGenesisBlock() *Genesis {
 	return &Genesis{
 		Config:     params.CallistoTestnetChainConfig,
-		ExtraData:  hexutil.MustDecode("0x0000000000000000000000000000000000000000000000000000000000000000"),
+		ExtraData:  hexutil.MustDecode("0x0000000000000000000000000000000000000000000000000000000000000000183394f52b2c8c034835edba3bcececa6f60b5a80000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"),
 		GasLimit:   4700000,
-		Difficulty: big.NewInt(524288),
+		Difficulty: big.NewInt(1),
 		Timestamp:  1519622213,
 		Nonce:      0,
-		Coinbase:   common.HexToAddress("0xc3F70b10CE5EC4aA47ce44Eb0B7900A883cd45Dd"),
+		Coinbase:   common.HexToAddress("0x0000000000000000000000000000000000000000"),
 		Mixhash:    common.HexToHash("0x0000000000000000000000000000000000000000000000000000000000000000"),
 		Alloc:      decodePrealloc(callistoTestnetAllocData),
 	}
diff --git a/params/config.go b/params/config.go
index cdad8078b8..b9623fbba7 100644
--- a/params/config.go
+++ b/params/config.go
@@ -102,7 +102,10 @@ var (
 		CallistoStakeAddress:    common.HexToAddress("0x3c06f218Ce6dD8E2c535a8925A2eDF81674984D9"),
 		CallistoStakeReward:     CLOStakeReward,
 
-		Ethash: new(EthashConfig),
+		Clique: &CliqueConfig{
+			Period: 15,
+			Epoch:  30000,
+		},
 	}
 
 	// RinkebyChainConfig contains the chain parameters to run a node on the Rinkeby test network.