changing mole

i have small round normal looking mole on the back of my thigh, last time i lookd at it was around 5 years ago , and then it was in dark brown color,today i lookd at it and it was still small rond aregular , but the color uniformly changed to light brown, is it a normal change? i also went 1 year ago to the dermatologist to check all my moles and he said all of them were normal,i dont know if the molew changed color then already or not,since i have not lookd a tit in 5 year , should i go agian? u can reply in hebrew