請教老貓What should i do for these extra money?????????

I am working part time and have about $300 income per week. the money is deposited directly into my bank account every week by my company. However, since 2 weeks ago, I have found that the company deposit much more than I eared. last week it deposited $1500 something. this week I have found it deposit $2300 something. What should I do? Will I have trouble for not to tell the company they make a mistake if they finally found out? Please help me and give me advices.
Thanks