diff --git a/eth/common/eth_types.nim b/eth/common/eth_types.nim
index ba942bb..3a30455 100644
--- a/eth/common/eth_types.nim
+++ b/eth/common/eth_types.nim
@@ -98,7 +98,7 @@ type
     value*         : UInt256
     payload*       : Blob
     accessList*    : AccessList           # EIP-2930
-    maxFeePerBlobGas*: GasInt             # EIP-4844
+    maxFeePerBlobGas*: UInt256            # EIP-4844
     versionedHashes*: VersionedHashes     # EIP-4844
     networkPayload*: NetworkPayload       # EIP-4844
     V*             : int64
diff --git a/tests/common/test_eip4844.nim b/tests/common/test_eip4844.nim
index 9af8958..f790314 100644
--- a/tests/common/test_eip4844.nim
+++ b/tests/common/test_eip4844.nim
@@ -100,7 +100,7 @@ proc tx6(i: int): Transaction =
     maxFee:              10.GasInt,
     accessList:          accesses,
     versionedHashes:     @[digest],
-    networkPayload: NetworkPayload(        
+    networkPayload: NetworkPayload(
         blobs: @[blob],
         commitments: @[zeroG1],
         proofs: @[zeroG1],
@@ -120,7 +120,7 @@ proc tx7(i: int): Transaction =
     maxFee:              10.GasInt,
     accessList:          accesses,
     versionedHashes:     @[digest],
-    maxFeePerBlobGas:    10000000.GasInt,
+    maxFeePerBlobGas:    10000000.u256,
   )
 
 proc tx8(i: int): Transaction =
@@ -137,7 +137,7 @@ proc tx8(i: int): Transaction =
     maxFee:              10.GasInt,
     accessList:          accesses,
     versionedHashes:     @[digest],
-    maxFeePerBlobGas:    10000000.GasInt,
+    maxFeePerBlobGas:    10000000.u256,
   )
 
 template roundTrip(txFunc: untyped, i: int) =