Provided is a lightning protection system for a wind turbine, including a connection unit to be placed between a nacelle and at least one blade of the wind turbine for conducting lightning current and/or static energy from the at least one blade to the nacelle, the connection unit including a first end portion with at least one nacelle contacting element, a second end portion with at least one blade contacting element, at least one first support member supporting the at least one nacelle contacting element, at least one second support member supporting the at least one blade contacting element, a base portion located between the first support member and the second support member, and at least one shifting element mechanically connecting the first support member and/or the second support member slidably relative to the base portion for amending a length of the connection unit in an amending direction from the blade to the nacelle.