The Internet of things (IoT) presents the future of internet by incorporating objects to communicate with themselves. Different protocols have been emerged to meet the requirements of limited resource objects of IoT. Constrained Application Protocol (CoAP) is the application protocol which is used in IoT communication stack is prone to performance degradation resulted from traffic congestion. Basic congestion control suffers from different shortages and problems which lead to bandwidth consumption, data loss and increased delay. In this paper, a new adaptive congestion control mechanism to enhance performance has been proposed to overcome basic congestion control issues.