Washington (CNN) Civil rights activist and philosopher Cornel West on Monday endorsed Vermont Sen. Bernie Sanders for president.

"I endorse Brother @BernieSanders because he is a long-distance runner with integrity in the struggle for justice for over 50 years," West tweeted late Monday night.

West went on to say that it's time for Sanders' "prophetic voice to be heard across our crisis-ridden country."

While West has been a long time supporter of Sanders (and "not a Hillary Clinton fan at all" ), the endorsement comes weeks after Black Lives Matter activists disrupted a Sanders event in Seattle, taking the podium from the self proclaimed socialist who is seeking the Democratic Party's presidential nomination. West has frequently linked arms with Black Lives Matter activists and has been arrested with them during various protests.

"We will push him with integrity toward a more comprehensive vision of freedom for all," West tweeted.

I endorse Brother @BernieSanders because he is a long-distance runner with integrity in the struggle for justice for over 50 years. — Cornel West (@CornelWest) August 25, 2015

Now is the time for his prophetic voice to be heard across our crisis-ridden country. #BernieSanders — Cornel West (@CornelWest) August 25, 2015