Medical marijuana advocates on Tuesday vowed to overturn Los Angeles City Council’s decision to close down all of the city’s more than 850 medical marijuana dispensaries.

“This is an outrage that the city council would think a reasonable solution to the distribution of medical marijuana would be to simply outlaw it altogether,” said Don Duncan, California Director with Americans for Safe Access (ASA). “The tens of thousands of patients harmed by this vote will not take it sitting down. We will campaign forcefully to overturn this poor decision by the council.”

The council on Tuesday voted 13-1 to ban the sale of medical marijuana in the city, but patients and caregivers will still be allowed to grow limited amounts of the drug. A spokesperson told the Huffington Post that Mayor Antonio Villaraigosa planned to sign the ban into law next week.