FASTLED and u8x8 Conflict

#include <Arduino.h>
#include <U8x8lib.h>
#include <FastLED.h>

#ifdef U8X8_HAVE_HW_SPI
#include <SPI.h>
#endif

//OLED
U8X8_SSD1306_128X64_NONAME_HW_I2C u8x8(/* reset=*/ U8X8_PIN_NONE);

//LED Stripe
#define LED_PIN     5
#define COLOR_ORDER GRB
#define CHIPSET     WS2813
#define NUM_LEDS    30

#define BRIGHTNESS  50
#define FRAMES_PER_SECOND 60

CRGB leds[NUM_LEDS];

void setup() {
  delay(3000); // sanity delay

  //initOLED
  u8x8.begin();

  //init LED Stripe
 FastLED.addLeds<CHIPSET, LED_PIN, COLOR_ORDER>(leds, NUM_LEDS).setCorrection( TypicalLEDStrip );
 FastLED.setBrightness( BRIGHTNESS );
}

void loop()
{

  resetStripe();
  updateOLED();
  FastLED.show();
  FastLED.delay(1000 / FRAMES_PER_SECOND);

}

void resetStripe(){
  for(int i = 0; i < NUM_LEDS; i++) {
    leds[i] = CRGB::Green;
  }
}

void updateOLED(){
  u8x8.clearDisplay();
  u8x8.setFont(u8x8_font_px437wyse700a_2x2_r);
  u8x8.drawString(0, 0, "Hello World");
}