Systems and methods for disarming a security system using a two-dimensional scannable access code are provided. Such systems and methods can include a control panel the security that generates a valid two-dimensional scannable access code, stores identifying information for the valid two-dimensional scannable access code in a memory device of the security system, and shares the valid two-dimensional scannable access code with a user of the security system. In some embodiments, when the security system is in an armed state, the security system can scan a presented two-dimensional scannable access code, decode associated information from the presented two-dimensional scannable access code, compare the associated information to the identifying information, and when the associated information matches the identifying information, transition the security system from the armed state to a disarmed state to allow the user to access an area protected by the security system.