diff --git a/nimbus/rpc/rpc_types.nim b/nimbus/rpc/rpc_types.nim
index f715cb20b..3bf6002b9 100644
--- a/nimbus/rpc/rpc_types.nim
+++ b/nimbus/rpc/rpc_types.nim
@@ -24,9 +24,9 @@ type
     to*: EthAddressStr        # (optional when creating new contract) the address the transaction is directed to.
     gas*: GasInt              # (optional, default: 90000) integer of the gas provided for the transaction execution. It will return unused gas.
     gasPrice*: GasInt         # (optional, default: To-Be-Determined) integer of the gasPrice used for each paid gas.
-    value*: int               # (optional) integer of the value sent with this transaction.
+    value*: UInt256           # (optional) integer of the value sent with this transaction.
     data*: EthHashStr         # TODO: Support more data. The compiled code of a contract OR the hash of the invoked method signature and encoded parameters. For details see Ethereum Contract ABI.
-    nonce*: int               # (optional) integer of a nonce. This allows to overwrite your own pending transactions that use the same nonce 
+    nonce*: AccountNonce      # (optional) integer of a nonce. This allows to overwrite your own pending transactions that use the same nonce 
 
   EthCall* = object
     # Parameter from user
@@ -34,7 +34,7 @@ type
     to*: EthAddressStr        # The address the transaction is directed to.
     gas*: GasInt              # (optional) Integer of the gas provided for the transaction execution. eth_call consumes zero gas, but this parameter may be needed by some executions.
     gasPrice*: GasInt         # (optional) Integer of the gasPrice used for each paid gas.
-    value*: int               # (optional) Integer of the value sent with this transaction.
+    value*: UInt256           # (optional) Integer of the value sent with this transaction.
     data*: EthHashStr         # (optional) Hash of the method signature and encoded parameters. For details see Ethereum Contract ABI.
 
   ## A block object, or null when no block was found