diff --git a/rpc/jsonrpc/client/ws_client.go b/rpc/jsonrpc/client/ws_client.go
index 98cff05ce..624b08776 100644
--- a/rpc/jsonrpc/client/ws_client.go
+++ b/rpc/jsonrpc/client/ws_client.go
@@ -224,16 +224,6 @@ func (c *WSClient) Call(ctx context.Context, method string, params map[string]in
 	return c.Send(ctx, request)
 }
 
-// CallWithArrayParams enqueues a call request onto the Send queue. Params are
-// in a form of array (e.g. []interface{}{"abcd"}). Requests are JSON encoded.
-func (c *WSClient) CallWithArrayParams(ctx context.Context, method string, params []interface{}) error {
-	request, err := rpctypes.ArrayToRequest(c.nextRequestID(), method, params)
-	if err != nil {
-		return err
-	}
-	return c.Send(ctx, request)
-}
-
 // Private methods
 
 func (c *WSClient) nextRequestID() rpctypes.JSONRPCIntID {
diff --git a/rpc/jsonrpc/jsonrpc_test.go b/rpc/jsonrpc/jsonrpc_test.go
index e43e14d42..3e1fbded1 100644
--- a/rpc/jsonrpc/jsonrpc_test.go
+++ b/rpc/jsonrpc/jsonrpc_test.go
@@ -329,37 +329,6 @@ func TestWSNewWSRPCFunc(t *testing.T) {
 	assert.Equal(t, got, val)
 }
 
-func TestWSHandlesArrayParams(t *testing.T) {
-	ctx, cancel := context.WithCancel(context.Background())
-	defer cancel()
-
-	cl, err := client.NewWS(tcpAddr, websocketEndpoint)
-	require.NoError(t, err)
-
-	cl.Logger = log.NewTestingLogger(t)
-	require.Nil(t, cl.Start(ctx))
-	t.Cleanup(func() {
-		if err := cl.Stop(); err != nil {
-			t.Error(err)
-		}
-	})
-
-	val := testVal
-	params := []interface{}{val}
-	err = cl.CallWithArrayParams(ctx, "echo_ws", params)
-	require.NoError(t, err)
-
-	msg := <-cl.ResponsesCh
-	if msg.Error != nil {
-		t.Fatalf("%+v", err)
-	}
-	result := new(ResultEcho)
-	err = json.Unmarshal(msg.Result, result)
-	require.NoError(t, err)
-	got := result.Value
-	assert.Equal(t, got, val)
-}
-
 // TestWSClientPingPong checks that a client & server exchange pings
 // & pongs so connection stays alive.
 func TestWSClientPingPong(t *testing.T) {
diff --git a/rpc/jsonrpc/types/types.go b/rpc/jsonrpc/types/types.go
index 74a4cc52b..617be7ebd 100644
--- a/rpc/jsonrpc/types/types.go
+++ b/rpc/jsonrpc/types/types.go
@@ -116,24 +116,6 @@ func MapToRequest(id jsonrpcid, method string, params map[string]interface{}) (R
 	return NewRPCRequest(id, method, payload), nil
 }
 
-func ArrayToRequest(id jsonrpcid, method string, params []interface{}) (RPCRequest, error) {
-	var paramsMap = make([]json.RawMessage, len(params))
-	for i, value := range params {
-		valueJSON, err := tmjson.Marshal(value)
-		if err != nil {
-			return RPCRequest{}, err
-		}
-		paramsMap[i] = valueJSON
-	}
-
-	payload, err := json.Marshal(paramsMap)
-	if err != nil {
-		return RPCRequest{}, err
-	}
-
-	return NewRPCRequest(id, method, payload), nil
-}
-
 //----------------------------------------
 // RESPONSE