diff --git a/beacon/engine/gen_ed.go b/beacon/engine/gen_ed.go
index 0ae5a3b8f1..e90ad6af81 100644
--- a/beacon/engine/gen_ed.go
+++ b/beacon/engine/gen_ed.go
@@ -35,6 +35,7 @@ func (e ExecutableData) MarshalJSON() ([]byte, error) {
 		BlobGasUsed      *hexutil.Uint64         `json:"blobGasUsed"`
 		ExcessBlobGas    *hexutil.Uint64         `json:"excessBlobGas"`
 		ExecutionWitness *types.ExecutionWitness `json:"executionWitness,omitempty"`
+		ProofVersion     *uint8                  `json:"proofVersion"`
 	}
 	var enc ExecutableData
 	enc.ParentHash = e.ParentHash
@@ -60,6 +61,7 @@ func (e ExecutableData) MarshalJSON() ([]byte, error) {
 	enc.BlobGasUsed = (*hexutil.Uint64)(e.BlobGasUsed)
 	enc.ExcessBlobGas = (*hexutil.Uint64)(e.ExcessBlobGas)
 	enc.ExecutionWitness = e.ExecutionWitness
+	enc.ProofVersion = e.ProofVersion
 	return json.Marshal(&enc)
 }
 
@@ -84,6 +86,7 @@ func (e *ExecutableData) UnmarshalJSON(input []byte) error {
 		BlobGasUsed      *hexutil.Uint64         `json:"blobGasUsed"`
 		ExcessBlobGas    *hexutil.Uint64         `json:"excessBlobGas"`
 		ExecutionWitness *types.ExecutionWitness `json:"executionWitness,omitempty"`
+		ProofVersion     *uint8                  `json:"proofVersion"`
 	}
 	var dec ExecutableData
 	if err := json.Unmarshal(input, &dec); err != nil {
@@ -160,5 +163,8 @@ func (e *ExecutableData) UnmarshalJSON(input []byte) error {
 	if dec.ExecutionWitness != nil {
 		e.ExecutionWitness = dec.ExecutionWitness
 	}
+	if dec.ProofVersion != nil {
+		e.ProofVersion = dec.ProofVersion
+	}
 	return nil
 }
diff --git a/beacon/engine/types.go b/beacon/engine/types.go
index f91e18c27b..3984645f3e 100644
--- a/beacon/engine/types.go
+++ b/beacon/engine/types.go
@@ -77,6 +77,7 @@ type ExecutableData struct {
 	BlobGasUsed      *uint64                 `json:"blobGasUsed"`
 	ExcessBlobGas    *uint64                 `json:"excessBlobGas"`
 	ExecutionWitness *types.ExecutionWitness `json:"executionWitness,omitempty"`
+	ProofVersion     *uint8                  `json:"proofVersion"`
 }
 
 // JSON type overrides for executableData.
@@ -306,6 +307,11 @@ func ExecutableDataToBlockNoHash(data ExecutableData, versionedHashes []common.H
 // BlockToExecutableData constructs the ExecutableData structure by filling the
 // fields from the given block. It assumes the given block is post-merge block.
 func BlockToExecutableData(block *types.Block, fees *big.Int, sidecars []*types.BlobTxSidecar, requests [][]byte) *ExecutionPayloadEnvelope {
+	proofVersion := uint8(0)
+	// TODO: could be more strict
+	if len(sidecars) > 0 && len(sidecars[0].Proofs) != len(sidecars[0].Blobs) {
+		proofVersion = 1
+	}
 	data := &ExecutableData{
 		BlockHash:        block.Hash(),
 		ParentHash:       block.ParentHash(),
@@ -325,6 +331,7 @@ func BlockToExecutableData(block *types.Block, fees *big.Int, sidecars []*types.
 		BlobGasUsed:      block.BlobGasUsed(),
 		ExcessBlobGas:    block.ExcessBlobGas(),
 		ExecutionWitness: block.ExecutionWitness(),
+		ProofVersion:     &proofVersion,
 	}
 
 	// Add blobs.