diff --git a/shared/params/config.go b/shared/params/config.go
index e7aaa0610..db5f11824 100644
--- a/shared/params/config.go
+++ b/shared/params/config.go
@@ -129,42 +129,42 @@ var defaultBeaconConfig = &BeaconChainConfig{
 }
 
 var demoBeaconConfig = &BeaconChainConfig{
-	ZeroBalanceValidatorTTL:            4194304,
-	LatestRandaoMixesLength:            8192,
-	LatestBlockRootsLength:             8192,
-	MaxExits:                           16,
-	MaxAttestations:                    128,
-	MaxProposerSlashings:               16,
-	MaxCasperSlashings:                 16,
+	ZeroBalanceValidatorTTL:            defaultBeaconConfig.ZeroBalanceValidatorTTL,
+	LatestRandaoMixesLength:            defaultBeaconConfig.LatestRandaoMixesLength,
+	LatestBlockRootsLength:             defaultBeaconConfig.LatestBlockRootsLength,
+	MaxExits:                           defaultBeaconConfig.MaxExits,
+	MaxAttestations:                    defaultBeaconConfig.MaxAttestations,
+	MaxProposerSlashings:               defaultBeaconConfig.MaxProposerSlashings,
+	MaxCasperSlashings:                 defaultBeaconConfig.MaxCasperSlashings,
 	ShardCount:                         5,
-	MaxDeposit:                         32,
-	MinTopUpSize:                       1,
-	MinOnlineDepositSize:               16,
-	Gwei:                               1e9,
-	MaxDepositInGwei:                   32 * 1e9,
-	DepositsForChainStart:              16384,
+	MaxDeposit:                         defaultBeaconConfig.MaxDeposit,
+	MinTopUpSize:                       defaultBeaconConfig.MinTopUpSize,
+	MinOnlineDepositSize:               defaultBeaconConfig.MinOnlineDepositSize,
+	Gwei:                               defaultBeaconConfig.Gwei,
+	MaxDepositInGwei:                   defaultBeaconConfig.MaxDepositInGwei,
+	DepositsForChainStart:              defaultBeaconConfig.DepositsForChainStart,
 	TargetCommitteeSize:                uint64(3),
 	SlotDuration:                       uint64(2),
 	CycleLength:                        uint64(5),
 	MinValidatorSetChangeInterval:      uint64(15),
-	MinAttestationInclusionDelay:       uint64(4),
-	SqrtExpDropTime:                    uint64(65536),
+	MinAttestationInclusionDelay:       defaultBeaconConfig.MinAttestationInclusionDelay,
+	SqrtExpDropTime:                    defaultBeaconConfig.SqrtExpDropTime,
 	MinWithdrawalPeriod:                uint64(20),
 	WithdrawalsPerCycle:                uint64(2),
 	BaseRewardQuotient:                 defaultBeaconConfig.BaseRewardQuotient,
-	MaxValidatorChurnQuotient:          uint64(32),
-	InitialForkVersion:                 0,
-	InitialSlotNumber:                  0,
-	RandBytes:                          3,
+	MaxValidatorChurnQuotient:          defaultBeaconConfig.MaxValidatorChurnQuotient,
+	InitialForkVersion:                 defaultBeaconConfig.InitialForkVersion,
+	InitialSlotNumber:                  defaultBeaconConfig.InitialSlotNumber,
+	RandBytes:                          defaultBeaconConfig.RandBytes,
 	InitialForkSlot:                    defaultBeaconConfig.InitialForkSlot,
 	SimulatedBlockRandao:               [32]byte{'S', 'I', 'M', 'U', 'L', 'A', 'T', 'E', 'R'},
 	SyncPollingInterval:                2 * 4, // Query nodes over the network every 4 slots for sync status.
 	GenesisTime:                        time.Now(),
-	MaxNumLog2Validators:               24,
+	MaxNumLog2Validators:               defaultBeaconConfig.MaxNumLog2Validators,
 	EpochLength:                        defaultBeaconConfig.EpochLength,
 	PowReceiptRootVotingPeriod:         defaultBeaconConfig.PowReceiptRootVotingPeriod,
 	InactivityPenaltyQuotient:          defaultBeaconConfig.InactivityPenaltyQuotient,
-	ZeroHash:                           [32]byte{},
+	ZeroHash:                           defaultBeaconConfig.ZeroHash,
 	EmptySignature:                     makeEmptySignature(),
 	CollectivePenaltyCalculationPeriod: defaultBeaconConfig.CollectivePenaltyCalculationPeriod,
 	IncluderRewardQuotient:             defaultBeaconConfig.IncluderRewardQuotient,