First blog post

Hello
I need to ask a quick question. I have recently received a residence permit in Germany as I’m a non EU family member (husband) of EU national and my wife is Slovak national and she is excercising treaty right in Germany. The residence card I have just received is valid for only one year. I have heard that it should be valid for 5 years. Do I need to contact any authority about this matter or is it just normal?
Thanks