diff --git a/chaincfg/params.go b/chaincfg/params.go
index bde39c18..3a99befc 100644
--- a/chaincfg/params.go
+++ b/chaincfg/params.go
@@ -126,6 +126,7 @@ var MainNetParams = Params{
 		{279000, newShaHashFromStr("0000000000000001ae8c72a0b0c301f67e3afca10e819efa9041e458e9bd7e40")},
 		{300255, newShaHashFromStr("0000000000000000162804527c6e9b9f0563a280525f9d08c12041def0a0f3b2")},
 		{319400, newShaHashFromStr("000000000000000021c6052e9becade189495d1c539aa37c58917305fd15f13b")},
+		{343185, newShaHashFromStr("0000000000000000072b8bf361d01a6ba7d445dd024203fafc78768ed4368554")},
 	},
 
 	// Enforce current block version once majority of the network has