diff --git a/app/app.go b/app/app.go
index 42654374c..85506ed42 100644
--- a/app/app.go
+++ b/app/app.go
@@ -1,6 +1,7 @@
 package app
 
 import (
+	"fmt"
 	"github.com/tendermint/basecoin/state"
 	"github.com/tendermint/basecoin/types"
 	. "github.com/tendermint/go-common"
@@ -38,6 +39,7 @@ func (app *Basecoin) SetOption(key string, value string) (log string) {
 	switch key {
 	case "chainID":
 		app.state.SetChainID(value)
+		return "Success"
 	case "account":
 		var err error
 		var setAccount types.Account
@@ -119,5 +121,6 @@ func (app *Basecoin) InitChain(validators []*tmsp.Validator) {
 
 // TMSP::EndBlock
 func (app *Basecoin) EndBlock(height uint64) []*tmsp.Validator {
+	app.state.ResetCacheState()
 	return app.govMint.EndBlock(height)
 }
diff --git a/types/account.go b/types/account.go
index 9d8e6bace..d17083968 100644
--- a/types/account.go
+++ b/types/account.go
@@ -7,9 +7,9 @@ import (
 )
 
 type Account struct {
-	PubKey   crypto.PubKey // May be nil, if not known.
-	Sequence int
-	Balance  int64
+	PubKey   crypto.PubKey `json:"pub_key"` // May be nil, if not known.
+	Sequence int           `json:"sequence"`
+	Balance  int64         `json:"balance"`
 }
 
 func (acc *Account) Copy() *Account {