An example of a system may include a controller to monitor network parameters in a wireless local area network (WLAN), the controller may include a processing resource and a memory resource including instructions executable by the processing resource to analyze network parameters in the WLAN over a period of time, determine a threshold for the network parameters, determine a plurality of time intervals based on an upgrade to be applied to the WLAN, identify when the network parameters of the WLAN are below the determined threshold, and initiate the upgrade to the WLAN when the network parameters are below the determined threshold where the upgrade is performed during one of the plurality of time intervals.