The Metropolitan Police will deploy more officers inside the London Stadium for West Ham's Premier League clash with Stoke City on Saturday.
Security has been a major issue since the Hammers' move to the ground on the Queen Elizabeth Olympic Park at the start of this season.
There were ugly scenes at last week's EFL Cup match between West Ham and London rivals Chelsea despite police officers being inside the stadium for the first time.
The Football Association opened an investigation after six people were arrested, and more than 200 fans face banning orders.