diff --git a/gql/util.go b/gql/util.go
index bbcdb2f1..7af2aa0e 100644
--- a/gql/util.go
+++ b/gql/util.go
@@ -24,7 +24,7 @@ const ExpiryTimeAttributeName = "expiryTime"
 func getGQLCoin(coin sdk.Coin) *Coin {
 	gqlCoin := Coin{
 		Type:     coin.Denom,
-		Quantity: coin.Amount.String(),
+		Quantity: coin.Amount.BigInt().String(),
 	}
 
 	return &gqlCoin
diff --git a/init.sh b/init.sh
index bfd5f72d..c4728699 100755
--- a/init.sh
+++ b/init.sh
@@ -111,4 +111,4 @@ if [[ $1 == "pending" ]]; then
 fi
 
 # Start the node (remove the --pruning=nothing flag if historical queries are not needed)
-chibaclonkd start --pruning=nothing --evm.tracer=json $TRACE --log_level $LOGLEVEL --minimum-gas-prices=0.0001aphoton --json-rpc.api eth,txpool,personal,net,debug,web3,miner --api.enable --gql-server --gql-playground
+chibaclonkd start --mode validator --pruning=nothing --evm.tracer=json $TRACE --log_level $LOGLEVEL --minimum-gas-prices=0.0001aphoton --json-rpc.api eth,txpool,personal,net,debug,web3,miner --api.enable --gql-server --gql-playground
diff --git a/types/codec.go b/types/codec.go
index 0db2b542..29b9884b 100644
--- a/types/codec.go
+++ b/types/codec.go
@@ -2,6 +2,7 @@ package types
 
 import (
 	codectypes "github.com/cosmos/cosmos-sdk/codec/types"
+	"github.com/cosmos/cosmos-sdk/types/tx"
 	authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
 )
 
@@ -23,4 +24,9 @@ func RegisterInterfaces(registry codectypes.InterfaceRegistry) {
 		(*ExtensionOptionsWeb3TxI)(nil),
 		&ExtensionOptionsWeb3Tx{},
 	)
+	registry.RegisterInterface(
+		"ethermint.types.v1.ExtensionOptionsWeb3Tx",
+		(*tx.TxExtensionOptionI)(nil),
+		&ExtensionOptionsWeb3Tx{},
+	)
 }