Is the pinky your weak link? If it is, you are not alone. The pinky and ring finger share a tendon. Either of those fingers prefers moving in tandem, rather than on their own, so it is a good idea to isolate them.
As for the pinky, it is also the weakest of the bunch. These drills will get your smallest finger up to speed, pinky promise!
Be sure to download the transcription and follow along with the video.