diff --git a/rpc/lib/server/handlers.go b/rpc/lib/server/handlers.go
index f35a5df8d..5745f6fa1 100644
--- a/rpc/lib/server/handlers.go
+++ b/rpc/lib/server/handlers.go
@@ -539,7 +539,7 @@ func (wsc *wsConnection) writeRoutine() {
 				return
 			}
 		case msg := <-wsc.writeChan:
-			jsonBytes, err := json.Marshal(msg)
+			jsonBytes, err := json.MarshalIndent(msg, "", "  ")
 			if err != nil {
 				wsc.Logger.Error("Failed to marshal RPCResponse to JSON", "error", err)
 			} else {
diff --git a/rpc/lib/server/http_server.go b/rpc/lib/server/http_server.go
index 01b5b17d9..3b856b5db 100644
--- a/rpc/lib/server/http_server.go
+++ b/rpc/lib/server/http_server.go
@@ -48,7 +48,7 @@ func StartHTTPServer(listenAddr string, handler http.Handler, logger log.Logger)
 }
 
 func WriteRPCResponseHTTPError(w http.ResponseWriter, httpCode int, res types.RPCResponse) {
-	jsonBytes, err := json.Marshal(res)
+	jsonBytes, err := json.MarshalIndent(res, "", "  ")
 	if err != nil {
 		panic(err)
 	}
@@ -59,7 +59,7 @@ func WriteRPCResponseHTTPError(w http.ResponseWriter, httpCode int, res types.RP
 }
 
 func WriteRPCResponseHTTP(w http.ResponseWriter, res types.RPCResponse) {
-	jsonBytes, err := json.Marshal(res)
+	jsonBytes, err := json.MarshalIndent(res, "", "  ")
 	if err != nil {
 		panic(err)
 	}
diff --git a/types/validator_set.go b/types/validator_set.go
index f6a8faf46..214e073d0 100644
--- a/types/validator_set.go
+++ b/types/validator_set.go
@@ -6,9 +6,9 @@ import (
 	"sort"
 	"strings"
 
+	"github.com/tendermint/go-wire"
 	cmn "github.com/tendermint/tmlibs/common"
 	"github.com/tendermint/tmlibs/merkle"
-	"github.com/tendermint/go-wire"
 )
 
 // ValidatorSet represent a set of *Validator at a given height.
@@ -23,8 +23,9 @@ import (
 // TODO: consider validator Accum overflow
 // TODO: move valset into an iavl tree where key is 'blockbonded|pubkey'
 type ValidatorSet struct {
-	Validators []*Validator // NOTE: persisted via reflect, must be exported.
-	Proposer   *Validator
+	// NOTE: persisted via reflect, must be exported.
+	Validators []*Validator `json:"validators"`
+	Proposer   *Validator   `json:"proposer"`
 
 	// cached (unexported)
 	totalVotingPower int64