"The Assembly of States Parties is the established framework to listen to what changes can be made," said Kaba, president of the ICC's Assembly.
Kaba acknowledged criticism that the court, based in The Hague, Netherlands, mostly prosecutes African nationals, adding "But we must also remember that these are African states that have applied to the court."
Kaba spoke as South Africa's main opposition party criticised the government's decision last week to withdraw from the ICC, which has more than 120 member states.
Also last week, Burundi President Pierre Nkurunziza signed legislation to withdraw from the ICC.
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Human Rights Watch has called South Africa's decision to withdraw from the ICC an "enormous blow to its commitment to justice for atrocity crimes," and called on ICC member states to reaffirm their support.
But some African countries have argued the court has unfairly targeted their continent and they are strengthening their own institutions to deal with threats to human rights.