We demonstrate enhanced radio frequency (RF) detection sensitivity in a magnetic tunnel junction based spin torque oscillator (STO) using parametric synchronization. The parametric synchronization is observed above the auto-oscillation threshold of the STO and enhances the RF sensitivity at 2f(0), where f(0) is the auto-oscillation frequency. The maximum RF sensitivity for parametric synchronization at 2f(0) similar or equal to 9GHz is 16 mV/mW, while the maximum RF sensitivity at f(0) similar or equal to 4: 5GHz without parametric synchronization is 12 mV/mW. Macrospin simulations corroborate the experimental results.