diff --git a/params/config.go b/params/config.go
index 2e62f335e7..025820382b 100644
--- a/params/config.go
+++ b/params/config.go
@@ -142,6 +142,22 @@ var (
 			WaitPeriod:           2,
 			MinePeriod:           2,
 		},
+		1962900: {
+			SwitchRound:          1962900,
+			CertThreshold:        50, // attack fix by reduce this number
+			TimeoutSyncThreshold: 5,
+			TimeoutPeriod:        25,
+			WaitPeriod:           2,
+			MinePeriod:           2,
+		},
+		1964900: {
+			SwitchRound:          1964900,
+			CertThreshold:        73, // recover back to normal number, expect all nodes is back into masternode list
+			TimeoutSyncThreshold: 5,
+			TimeoutPeriod:        25,
+			WaitPeriod:           2,
+			MinePeriod:           2,
+		},
 	}
 
 	UnitTestV2Configs = map[uint64]*V2Config{