Google co-founder Sergey Brin and his wife have donated $500,000 to the Wikimedia Foundation that runs free online encyclopedia Wikipedia.

According to AFP, the grant was made by the Brin Wojcicki Foundation founded by Brin and his wife, Anne Wojcicki, the co-founder of 23andMe, a personal genetics company, the Brin Wojcicki Foundation said in a statement on Friday, November 18.

The non-profit Wikimedia Foundation launched its annual fundraising drive this week and visitors to Wikipedia.org are currently met with an appeal for donations from Wikipedia founder Jimmy Wales.

Google donated $2 million to the Wikimedia Foundation last year.