My wireless is too slow. How do I change wifi driver?

Support Network
2

Here is more details on my wifi adaptor

03:00.0 Network controller [0280]: Broadcom Inc. and subsidiaries BCM4313 802.11bgn Wireless Network Adapter [14e4:4727] (rev 01)
	Subsystem: Wistron NeWeb Corp. Device [185f:051a]
	Flags: bus master, fast devsel, latency 0, IRQ 16
	Memory at fea00000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: <access denied>
	Kernel driver in use: bcma-pci-bridge
	Kernel modules: bcma