diff --git a/core/types/transaction_marshalling.go b/core/types/transaction_marshalling.go
index 8602e1a83f1a..137ac2febc98 100644
--- a/core/types/transaction_marshalling.go
+++ b/core/types/transaction_marshalling.go
@@ -52,7 +52,7 @@ type txJSON struct {
 	Hash common.Hash `json:"hash"`
 
 	// L1 message transaction fields:
-	Sender     common.Address  `json:"sender,omitempty"`
+	Sender     *common.Address `json:"sender,omitempty"`
 	QueueIndex *hexutil.Uint64 `json:"queueIndex,omitempty"`
 }
 
@@ -130,6 +130,14 @@ func (tx *Transaction) MarshalJSON() ([]byte, error) {
 		yparity := itx.V.Uint64()
 		enc.YParity = (*hexutil.Uint64)(&yparity)
 
+	case *L1MessageTx:
+		enc.QueueIndex = (*hexutil.Uint64)(&itx.QueueIndex)
+		enc.Gas = (*hexutil.Uint64)(&itx.Gas)
+		enc.To = tx.To()
+		enc.Value = (*hexutil.Big)(itx.Value)
+		enc.Input = (*hexutil.Bytes)(&itx.Data)
+		enc.Sender = &itx.Sender
+
 	case *BlobTx:
 		enc.ChainID = (*hexutil.Big)(itx.ChainID.ToBig())
 		enc.Nonce = (*hexutil.Uint64)(&itx.Nonce)
@@ -425,7 +433,10 @@ func (tx *Transaction) UnmarshalJSON(input []byte) error {
 			return errors.New("missing required field 'input' in transaction")
 		}
 		itx.Data = *dec.Input
-		itx.Sender = dec.Sender
+		if dec.Sender == nil {
+			return errors.New("missing required field 'sender' in transaction")
+		}
+		itx.Sender = *dec.Sender
 
 	default:
 		return ErrTxTypeNotSupported
diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index 9b3925ca6237..a9198a031494 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -1294,7 +1294,7 @@ type RPCTransaction struct {
 	S                *hexutil.Big      `json:"s"`
 
 	// L1 message transaction fields:
-	Sender     common.Address  `json:"sender,omitempty"`
+	Sender     *common.Address `json:"sender,omitempty"`
 	QueueIndex *hexutil.Uint64 `json:"queueIndex,omitempty"`
 }
 
@@ -1344,7 +1344,7 @@ func NewRPCTransaction(tx *types.Transaction, blockHash common.Hash, blockNumber
 		}
 	case types.L1MessageTxType:
 		msg := tx.AsL1MessageTx()
-		result.Sender = msg.Sender
+		result.Sender = &msg.Sender
 		result.QueueIndex = (*hexutil.Uint64)(&msg.QueueIndex)
 	}
 	return result
diff --git a/params/version.go b/params/version.go
index 0fa8fd5f9552..e9366e4fa4fc 100644
--- a/params/version.go
+++ b/params/version.go
@@ -24,7 +24,7 @@ import (
 const (
 	VersionMajor = 5         // Major version component of the current release
 	VersionMinor = 1         // Minor version component of the current release
-	VersionPatch = 19        // Patch version component of the current release
+	VersionPatch = 20        // Patch version component of the current release
 	VersionMeta  = "mainnet" // Version metadata to append to the version string
 )