Originally Posted by: theMolster

I wonder if anybody knows any good exercises?

These tutorials are aimed at acquiring, building & maintaining strength & dexterity, especially in your ring & pinky fingers.

Trill Drills

https://www.guitartricks.com/tutorial.php?input=1829

Building Pinky Strength & Dexterity

https://www.guitartricks.com/tutorial.php?input=1292

Hope that helps! Best of success with it!