diff --git a/core/types/block.go b/core/types/block.go
index 7c70bd0f700a..bb9d547c75f4 100644
--- a/core/types/block.go
+++ b/core/types/block.go
@@ -366,6 +366,11 @@ func (b *Block) Requests() Requests         { return b.requests }
 
 func (b *Block) Deposits() Deposits {
 	var deps Deposits
+	if b.requests != nil {
+		// If requests is non-nil, it means deposits are available in block and we
+		// should return an empty slice instead of nil if there are no deposits.
+		deps = make(Deposits, 0)
+	}
 	for _, r := range b.requests {
 		if d, ok := r.inner.(*Deposit); ok {
 			deps = append(deps, d)
@@ -375,6 +380,11 @@ func (b *Block) Deposits() Deposits {
 }
 func (b *Block) WithdrawalRequests() WithdrawalRequests {
 	var wxs WithdrawalRequests
+	if b.requests != nil {
+		// If requests is non-nil, it means wx requests are available in block and
+		// we should return an empty slice instead of nil if there are no wxs.
+		wxs = make(WithdrawalRequests, 0)
+	}
 	for _, r := range b.requests {
 		if w, ok := r.inner.(*WithdrawalRequest); ok {
 			wxs = append(wxs, w)
diff --git a/eth/catalyst/api.go b/eth/catalyst/api.go
index 62c6e5e6d95f..0a674ba27b71 100644
--- a/eth/catalyst/api.go
+++ b/eth/catalyst/api.go
@@ -553,8 +553,8 @@ func (api *ConsensusAPI) NewPayloadV4(params engine.ExecutableData, versionedHas
 		return engine.PayloadStatusV1{Status: engine.INVALID}, engine.InvalidParams.With(errors.New("nil beaconRoot post-cancun"))
 	}
 
-	if api.eth.BlockChain().Config().LatestFork(params.Timestamp) != forks.Cancun {
-		return engine.PayloadStatusV1{Status: engine.INVALID}, engine.UnsupportedFork.With(errors.New("newPayloadV3 must only be called for cancun payloads"))
+	if api.eth.BlockChain().Config().LatestFork(params.Timestamp) != forks.Prague {
+		return engine.PayloadStatusV1{Status: engine.INVALID}, engine.UnsupportedFork.With(errors.New("newPayloadV4 must only be called for prague payloads"))
 	}
 	return api.newPayload(params, versionedHashes, beaconRoot)
 }
diff --git a/eth/catalyst/simulated_beacon.go b/eth/catalyst/simulated_beacon.go
index fecd83f2762c..77aeba336af4 100644
--- a/eth/catalyst/simulated_beacon.go
+++ b/eth/catalyst/simulated_beacon.go
@@ -101,7 +101,7 @@ func NewSimulatedBeacon(period uint64, eth *eth.Ethereum) (*SimulatedBeacon, err
 
 	// if genesis block, send forkchoiceUpdated to trigger transition to PoS
 	if block.Number.Sign() == 0 {
-		if _, err := engineAPI.ForkchoiceUpdatedV2(current, nil); err != nil {
+		if _, err := engineAPI.ForkchoiceUpdatedV3(current, nil); err != nil {
 			return nil, err
 		}
 	}
@@ -202,13 +202,13 @@ func (c *SimulatedBeacon) sealBlock(withdrawals []*types.Withdrawal, timestamp u
 		}
 	}
 	// Mark the payload as canon
-	if _, err = c.engineAPI.NewPayloadV3(*payload, blobHashes, &common.Hash{}); err != nil {
+	if _, err = c.engineAPI.NewPayloadV4(*payload, blobHashes, &common.Hash{}); err != nil {
 		return err
 	}
 	c.setCurrentState(payload.BlockHash, finalizedHash)
 
 	// Mark the block containing the payload as canonical
-	if _, err = c.engineAPI.ForkchoiceUpdatedV2(c.curForkchoiceState, nil); err != nil {
+	if _, err = c.engineAPI.ForkchoiceUpdatedV3(c.curForkchoiceState, nil); err != nil {
 		return err
 	}
 	c.lastBlockTime = payload.Timestamp