diff --git a/chaincfg/mainnetparams.go b/chaincfg/mainnetparams.go
index 7eefe799..f58609ec 100644
--- a/chaincfg/mainnetparams.go
+++ b/chaincfg/mainnetparams.go
@@ -128,9 +128,19 @@ func MainNetParams() *Params {
 			{181020, newHashFromStr("00000000000000b77d832cb2cbed02908d69323862a53e56345400ad81a6fb8f")},
 			{189950, newHashFromStr("000000000000007341d8ae2ea7e41f25cee00e1a70a4a3dc1cb055d14ecb2e11")},
 			{214672, newHashFromStr("0000000000000021d5cbeead55cb7fd659f07e8127358929ffc34cd362209758")},
+			{237310, newHashFromStr("000000000000000a6815e366425acd30354dfdcb55f401e38b037e87ca00f171")},
 			{259810, newHashFromStr("0000000000000000ee0fbf469a9f32477ffbb46ebd7a280a53c842ab4243f97c")},
+			{277940, newHashFromStr("000000000000000043b47c777bc96760e6fccc872cc8edb295b230dd8dd0f5d7")},
 			{295940, newHashFromStr("0000000000000000148852c8a919addf4043f9f267b13c08df051d359f1622ca")},
+			{318020, newHashFromStr("00000000000000002765c601fe4455126ab27913fcc2d2db28f78e1e6bb77266")},
+			{340120, newHashFromStr("00000000000000001a9ba30acfd8272aa1514ce7979fc508118ee3764a19df46")},
+			{362120, newHashFromStr("00000000000000000219580063387071893bcd0992cacb5f0aa55fc9e6c4a0ab")},
 			{384170, newHashFromStr("00000000000000001704bbc6bda8c4864a71cd0febcc0b44d753c69d83840f04")},
+			{404170, newHashFromStr("000000000000000010352022d88733bac2665c882030db071ce5ea29970fefd8")},
+			{424170, newHashFromStr("00000000000000000b8526a9fdd31fcb249c992fc0741d422528ce2fa975bbd0")},
+			{444170, newHashFromStr("00000000000000000673a109a997e8ca41bc4ece86445bc89c1bb2b9921633cc")},
+			{464170, newHashFromStr("0000000000000000063c4588ffa1ff25978c025eaf529f39bcbad8b962502f65")},
+			{483600, newHashFromStr("000000000000000010f98f7354b501b5747011c82d53b989dbcb368e5059ff9e")},
 		},
 
 		// MinKnownChainWork is the minimum amount of known total work for the
diff --git a/chaincfg/testnetparams.go b/chaincfg/testnetparams.go
index 1eaf5b7b..a438f1b2 100644
--- a/chaincfg/testnetparams.go
+++ b/chaincfg/testnetparams.go
@@ -107,7 +107,13 @@ func TestNet3Params() *Params {
 		// Checkpoints ordered from oldest to newest.
 		Checkpoints: []Checkpoint{
 			{83520, newHashFromStr("0000000001e6244d95feae8b598e854905158c7bc781daf874afff88675ef0c8")},
+			{148320, newHashFromStr("0000000003535b80e4b759b8ec1790f81f429d9f5a810eda43c3afb64d9760b1")},
+			{213120, newHashFromStr("000000000009bb6909db742278f3ab7c9169ef396068cce7f750b587b72738af")},
 			{282340, newHashFromStr("0000001f538d6343316fe50709fa544b680a1be38141d003e755da8ad30f67a8")},
+			{347140, newHashFromStr("0000001638f00f197b882a00db04d1323e205f45bf1108e4f1bbc1f456d4250c")},
+			{411940, newHashFromStr("00000012b6d21f31f18a2f6d8b64e111327f011ac13a1b3e9d0d8b477f71f62b")},
+			{476740, newHashFromStr("00000005635a4b783ad4d85e0cb92f094e2e885a92ef4d6b8464b22a02646279")},
+			{515730, newHashFromStr("00000010ecddf8da5d91f7020f69130db8a163906d460cbbed2a91568701f0ac")},
 		},
 
 		// MinKnownChainWork is the minimum amount of known total work for the