diff --git a/consensus/ubqhash/consensus.go b/consensus/ubqhash/consensus.go
index 73e68f9c22..4beefb7952 100644
--- a/consensus/ubqhash/consensus.go
+++ b/consensus/ubqhash/consensus.go
@@ -51,13 +51,11 @@ var (
 	nPowMaxAdjustDown   = big.NewInt(16) // 16% adjustment down
 	nPowMaxAdjustUp     = big.NewInt(8)  // 8% adjustment up
 
-	diffChangeBlock       = big.NewInt(4088)
 	nPowAveragingWindow88 = big.NewInt(88)
 	nPowMaxAdjustDown2    = big.NewInt(3) // 3% adjustment down
 	nPowMaxAdjustUp2      = big.NewInt(2) // 2% adjustment up
 
 	// Flux
-	fluxChangeBlock       = big.NewInt(8000)
 	nPowMaxAdjustDownFlux = big.NewInt(5) // 0.5% adjustment down
 	nPowMaxAdjustUpFlux   = big.NewInt(3) // 0.3% adjustment up
 	nPowDampFlux          = big.NewInt(1) // 0.1%
@@ -394,10 +392,13 @@ func CalcDifficulty(chain consensus.ChainReader, time uint64, parent *types.Head
 	parentNumber := parent.Number
 	parentDiff := parent.Difficulty
 
-	if parentNumber.Cmp(diffChangeBlock) < 0 {
+	config := chain.Config()
+	ubqhashConfig := config.Ubqhash
+
+	if parentNumber.Cmp(ubqhashConfig.DigishieldModBlock) < 0 {
 		return calcDifficultyOrig(chain, parentNumber, parentDiff, parent)
 	}
-	if parentNumber.Cmp(fluxChangeBlock) < 0 {
+	if parentNumber.Cmp(ubqhashConfig.FluxBlock) < 0 {
 		// (chain consensus.ChainReader, parentNumber, parentDiff *big.Int, parent *types.Header)
 		return calcDifficulty2(chain, parentNumber, parentDiff, parent)
 	} else {
diff --git a/params/config.go b/params/config.go
index db078a16b7..bad6c1aaa2 100644
--- a/params/config.go
+++ b/params/config.go
@@ -42,7 +42,10 @@ var (
 		ByzantiumBlock:      big.NewInt(math.MaxInt64),
 		ConstantinopleBlock: big.NewInt(math.MaxInt64),
 		PetersburgBlock:     big.NewInt(math.MaxInt64),
-		Ubqhash:              new(UbqhashConfig),
+		Ubqhash: &UbqhashConfig{
+			DigishieldModBlock: big.NewInt(4088),
+			FluxBlock:          big.NewInt(8000),
+		},
 	}
 
 	// MainnetTrustedCheckpoint contains the light client trusted checkpoint for the main network.
@@ -65,7 +68,10 @@ var (
 		ByzantiumBlock:      big.NewInt(math.MaxInt64),
 		ConstantinopleBlock: big.NewInt(math.MaxInt64),
 		PetersburgBlock:     big.NewInt(math.MaxInt64),
-		Ubqhash:              new(UbqhashConfig),
+		Ubqhash: &UbqhashConfig{
+			DigishieldModBlock: big.NewInt(4088),
+			FluxBlock:          big.NewInt(8000),
+		},
 	}
 
 	// TestnetTrustedCheckpoint contains the light client trusted checkpoint for the Ropsten test network.
@@ -82,7 +88,7 @@ var (
 	//
 	// This configuration is intentionally not using keyed fields to force anyone
 	// adding flags to the config to also have to set these fields.
-	AllUbqhashProtocolChanges = &ChainConfig{big.NewInt(1337), big.NewInt(0), big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, new(UbqhashConfig), nil}
+	AllUbqhashProtocolChanges = &ChainConfig{big.NewInt(1337), big.NewInt(0), big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, &UbqhashConfig{DigishieldModBlock: big.NewInt(0), FluxBlock: big.NewInt(0)}, nil}
 
 	// AllCliqueProtocolChanges contains every protocol change (EIPs) introduced
 	// and accepted by the Ubiq core developers into the Clique consensus.
@@ -135,7 +141,10 @@ type ChainConfig struct {
 }
 
 // UbqhashConfig is the consensus engine configs for proof-of-work based sealing.
-type UbqhashConfig struct{}
+type UbqhashConfig struct {
+	DigishieldModBlock *big.Int `json:"digishieldModBlock"` // Block to activate the DigiShield V3 mod
+	FluxBlock          *big.Int `json:"fluxBlock"`          // Block to activate the Flux difficulty algorithm (must be > DigiShieldModBlock)
+}
 
 // String implements the stringer interface, returning the consensus engine details.
 func (c *UbqhashConfig) String() string {