diff --git a/core/genesis.go b/core/genesis.go
index 4a9f4089a8..f649230758 100644
--- a/core/genesis.go
+++ b/core/genesis.go
@@ -343,6 +343,7 @@ func DefaultGenesisBlock() *Genesis {
 	return &Genesis{
 		Config:     params.MainnetChainConfig,
 		Nonce:      66,
+		Timestamp:  1518538888,
 		ExtraData:  hexutil.MustDecode("0x11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa"),
 		GasLimit:   5000,
 		Difficulty: big.NewInt(131072),
@@ -374,6 +375,7 @@ func DefaultTestnetGenesisBlock() *Genesis {
 	return &Genesis{
 		Config:     params.TestnetChainConfig,
 		Nonce:      66,
+		Timestamp:  1518538888,
 		ExtraData:  hexutil.MustDecode("0x3535353535353535353535353535353535353535353535353535353535353535"),
 		GasLimit:   16777216,
 		Difficulty: big.NewInt(131072),
@@ -391,7 +393,7 @@ func DefaultRinkebyGenesisBlock() *Genesis {
         )
 	return &Genesis{
 		Config:     params.RinkebyChainConfig,
-		Timestamp:  1492009146,
+		Timestamp:  1518538888,
 		ExtraData:  hexutil.MustDecode("0x52657370656374206d7920617574686f7269746168207e452e436172746d616e42eb768f2244c8811c63729a21a3569731535f067ffc57839b00206d1ad20c69a1981b489f772031b279182d99e65703f0076e4812653aab85fca0f00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"),
 		GasLimit:   4700000,
 		Difficulty: big.NewInt(131072),