diff --git a/core/genesis.go b/core/genesis.go
index f132b0f70f..e529d8a8c0 100644
--- a/core/genesis.go
+++ b/core/genesis.go
@@ -268,7 +268,7 @@ func (g *Genesis) ToBlock(startingExpansionNumber uint64) *types.WorkObject {
 		wo.SetNumber(big.NewInt(0), i)
 		wo.SetParentHash(common.Hash{}, i)
 	}
-	
+
 	wo.WorkObjectHeader().SetHeaderHash(wo.Header().Hash())
 
 	return wo
@@ -328,7 +328,7 @@ func DefaultColosseumGenesisBlock(consensusEngine string, nonce uint64, extra []
 		Nonce:      nonce,
 		ExtraData:  extra,
 		GasLimit:   12000000,
-		Difficulty: big.NewInt(30000000000),
+		Difficulty: big.NewInt(1500000000000),
 	}
 	if consensusEngine == "blake3" {
 		genesis.Config = params.Blake3PowColosseumChainConfig
diff --git a/params/config.go b/params/config.go
index e543040e89..9c342d42a0 100644
--- a/params/config.go
+++ b/params/config.go
@@ -26,7 +26,7 @@ import (
 // Genesis hashes to enforce below configs on.
 var (
 	// Progpow GenesisHashes
-	ProgpowColosseumGenesisHash  = common.HexToHash("0xb87a8c2da17fd9b035c48d6fe324b7eaa98b42aa287eb0dfb3e2e4ef2b7eda37")
+	ProgpowColosseumGenesisHash  = common.HexToHash("0xac81c28f1a72591b87b5f16c9793cdc0e87c45c6d426d1a364c3b8f6386b5b8b")
 	ProgpowGardenGenesisHash     = common.HexToHash("0xe6d0f9327aae915db55ab0cf9da7841c64e4ae39baa251c17586d8d25b59afbc")
 	ProgpowOrchardGenesisHash    = common.HexToHash("0x12c80fbe68b732139343da9d7a97d06862b29a962b8749f2b977b83364612c96")
 	ProgpowLighthouseGenesisHash = common.HexToHash("0xf86f23baa7818c62b0d4bd5f2100230eab65392e0b115b91f446b299fddf38d8")