diff --git a/beacon_chain/libnimbus_lc/libnimbus_lc.nim b/beacon_chain/libnimbus_lc/libnimbus_lc.nim
index c521ea3f9..70597b8b2 100644
--- a/beacon_chain/libnimbus_lc/libnimbus_lc.nim
+++ b/beacon_chain/libnimbus_lc/libnimbus_lc.nim
@@ -1459,12 +1459,12 @@ proc ETHTransactionsCreateFromJson(
       return nil
 
     # Check fork consistency
-    static: doAssert totalSerializedFields(TransactionObject) == 21,
+    static: doAssert totalSerializedFields(TransactionObject) == 22,
       "Only update this number once code is adjusted to check new fields!"
     let txType =
       case data.`type`.get(0.Quantity):
       of 0.Quantity:
-        if data.accessList.isSome or
+        if data.yParity.isSome or data.accessList.isSome or
             data.maxFeePerGas.isSome or data.maxPriorityFeePerGas.isSome or
             data.maxFeePerBlobGas.isSome or data.blobVersionedHashes.isSome:
           return nil
@@ -1512,8 +1512,15 @@ proc ETHTransactionsCreateFromJson(
       return nil
     if distinctBase(data.gas) > int64.high.uint64:
       return nil
-    if data.v.uint64 > int64.high.uint64:
+    if distinctBase(data.v) > int64.high.uint64:
       return nil
+    if data.yParity.isSome:
+      # This is not always included, but if it is, make sure it's correct
+      let yParity = data.yParity.get
+      if distinctBase(yParity) > 1:
+        return nil
+      if yParity != data.v:
+        return nil
     let
       tx = ExecutionTransaction(
         txType: txType,
diff --git a/vendor/nim-web3 b/vendor/nim-web3
index 15325bd84..747001250 160000
--- a/vendor/nim-web3
+++ b/vendor/nim-web3
@@ -1 +1 @@
-Subproject commit 15325bd844a38234e4f705b3399d0bbfa3b63a12
+Subproject commit 747001250a27278e0f0f1706fe1dec88ad3ede8d