diff --git a/eth/common/eth_types.nim b/eth/common/eth_types.nim
index a9b72d1..d10c081 100644
--- a/eth/common/eth_types.nim
+++ b/eth/common/eth_types.nim
@@ -121,7 +121,7 @@ type
     # `baseFee` is the get/set of `fee`
     fee*:             Option[UInt256]   # EIP-1559
     withdrawalsRoot*: Option[Hash256]   # EIP-4895
-    excessDataGas*:   Option[GasInt]    # EIP-4844
+    excessDataGas*:   Option[UInt256]   # EIP-4844
 
   BlockBody* = object
     transactions*:  seq[Transaction]
diff --git a/eth/common/eth_types_rlp.nim b/eth/common/eth_types_rlp.nim
index 4746196..e34da6e 100644
--- a/eth/common/eth_types_rlp.nim
+++ b/eth/common/eth_types_rlp.nim
@@ -350,7 +350,7 @@ proc read*(rlp: var Rlp, T: type BlockHeader): T =
     result.withdrawalsRoot = some rlp.read(Hash256)
   if len >= 18:
     # EIP-4844
-    result.excessDataGas = some rlp.read(GasInt)
+    result.excessDataGas = some rlp.read(UInt256)
 
 proc rlpHash*[T](v: T): Hash256 =
   keccakHash(rlp.encode(v))
diff --git a/tests/rlp/test_common.nim b/tests/rlp/test_common.nim
index 2c0179a..7e27459 100644
--- a/tests/rlp/test_common.nim
+++ b/tests/rlp/test_common.nim
@@ -116,7 +116,7 @@ proc suite2() =
       doTest h
 
       # EIP-4844
-      h.excessDataGas = some GasInt(1337)
+      h.excessDataGas = some 1234.u256
       doTest h
 
 suite1()