He has, however, dismissed concerns that the party is headed for a split.
Ramaphosa addressed ANC and South African Communist Party supporters at the Moses Kotane memorial lecture in Rustenburg in the North West on Sunday.
Ramaphosa told supporters that when he met with ratings agency Moody's on Friday, they told him they were concerned that the party's factional battles would lead to a split.
“I looked them in the eye sternly and said, ‘It shall not happen.’”
But he suggested the problem is with the party's leaders.
