diff --git a/codec/block-ethereum.avsc b/codec/block-ethereum.avsc
index 6125fb84..d8ae44ea 100644
--- a/codec/block-ethereum.avsc
+++ b/codec/block-ethereum.avsc
@@ -333,39 +333,6 @@
                                              "int"
                                           ],
                                           "default":"null"
-                                       },
-                                       {
-                                          "name":"blobTxSidecar",
-                                          "type":{
-                                             "name":"blobTxSidecar_record",
-                                             "type":"record",
-                                             "fields":[
-                                                {
-                                                   "name":"Blobs",
-                                                   "type":[
-                                                      "null",
-                                                      "string"
-                                                   ],
-                                                   "default":"null"
-                                                },
-                                                {
-                                                   "name":"Commitments",
-                                                   "type":[
-                                                      "null",
-                                                      "string"
-                                                   ],
-                                                   "default":"null"
-                                                },
-                                                {
-                                                   "name":"Proofs",
-                                                   "type":[
-                                                      "null",
-                                                      "string"
-                                                   ],
-                                                   "default":"null"
-                                                }
-                                             ]
-                                          }
                                        }
                                     ]
                                  }
@@ -608,6 +575,46 @@
                                  }
                               ],
                               "default":"null"
+                           },
+                           {
+                              "name":"blobTxSidecar",
+                              "type":[
+                                 "null",
+                                 {
+                                    "type":"array",
+                                    "items":{
+                                       "name":"blobTxSidecar_record",
+                                       "type":"record",
+                                       "fields":[
+                                          {
+                                             "name":"Blobs",
+                                             "type":[
+                                                "null",
+                                                "string"
+                                             ],
+                                             "default":"null"
+                                          },
+                                          {
+                                             "name":"Commitments",
+                                             "type":[
+                                                "null",
+                                                "string"
+                                             ],
+                                             "default":"null"
+                                          },
+                                          {
+                                             "name":"Proofs",
+                                             "type":[
+                                                "null",
+                                                "string"
+                                             ],
+                                             "default":"null"
+                                          }
+                                       ]
+                                    }
+                                 }
+                              ],
+                              "default":"null"
                            }
                         ]
                      }
diff --git a/internal/types/eth.go b/internal/types/eth.go
index 23e62b15..d0faceb2 100644
--- a/internal/types/eth.go
+++ b/internal/types/eth.go
@@ -23,6 +23,7 @@ type BlockReplica struct {
 	Senders         []common.Address
 	State           *StateSpecimen `json:"State"`
 	Withdrawals     []*Withdrawal
+	BlobTxSidecars  []*BlobTxSidecar
 }
 type StateSpecimen struct {
 	AccountRead   []*AccountRead
@@ -89,7 +90,6 @@ type Transaction struct {
 	BlobFeeCap    *BigInt         `json:"blobFeeCap" rlp:"optional"`
 	BlobHashes    []common.Hash   `json:"blobHashes" rlp:"optional"`
 	BlobGas       uint64          `json:"blobGas" rlp:"optional"`
-	BlobTxSidecar *BlobTxSidecar  `json:"blobTxSidecar" rlp:"nil,optional"`
 }
 
 // AccessList is an EIP-2930 access list.
diff --git a/internal/utils/utils.go b/internal/utils/utils.go
index 418fb498..9c4c8c7e 100644
--- a/internal/utils/utils.go
+++ b/internal/utils/utils.go
@@ -241,8 +241,8 @@ func UnwrapAvroUnion(data map[string]interface{}) map[string]interface{} {
 	unwrapType(data, blobFeeCapLens, "bytes")
 	unwrapType(data, blobHashesLens, "array")
 	unwrapType(data, blobGasLens, "int")
-	
-	unwrapType(data, blobTxSidecarLens, "record")
+
+	unwrapType(data, blobTxSidecarLens, "array")
 	unwrapType(data, blobsLens, "string")
 	unwrapType(data, commitmentsLens, "string")
 	unwrapType(data, proofsLens, "string")
@@ -280,7 +280,7 @@ func MapToAvroUnion(data map[string]interface{}) map[string]interface{} {
 	wrapType(data, blobHashesLens, "array")
 	wrapType(data, blobGasLens, "int")
 
-	wrapType(data, blobTxSidecarLens, "record")
+	wrapType(data, blobTxSidecarLens, "array")
 	wrapType(data, blobsLens, "string")
 	wrapType(data, commitmentsLens, "string")
 	wrapType(data, proofsLens, "string")