Bonds of Infernal Power

Prerequisite: Pact of the Chain
Your Pact of the Chain familiar’s proficiency bonus is increased to be equal to yours. All Pact of the Chain familiars have a base proficiency bonus of 2 that is included in all of their skills, and modifiers.
Additionally, whenever you increase your ability scores through the Ability Score Increase class feature or obtaining a feat, you may increase one of your Pact of the Chain familiar’s ability scores of your choice by 1. Your familiar's ability scores cannot be raised above 18 in this way.