Navigate to the "About" tab and check if there is a red dot next to the "Firmware Update" text. If there is a red dot, then there is a new firmware update available. Update your bulb and hub firmware by tapping the arrow.
PLEASE NOTE: Keep the bulbs and hub powered on while the update is processing. The user may turn off the lights via the app, but must keep the bulbs connected to a power source in order for the update to go through. The hub will usually update within 10 minutes. The bulbs will usually update within 6 hours. However, in some cases, the bulbs may take up to 12 hours to update. If the bulbs have not been updated after 12 hours, please check to see if your internet connection is working. If your internet connection has no problems and your bulbs have still not updated, you can re-initiate the update attempt by turning the bulbs off and then on five times. The bulbs will blink twice to indicate that they have successfully re-initiated the attempt.