Method for adjusting a pitch angle of a rotor blade connected to a rotation shaft of a wind turbine, the method comprising, while a power output of the wind turbine is smaller than a nominal power output: obtaining a first maximal speed signal indicative of the first desired maximal rotational speed of the rotation shaft; deriving a first pitch angle (β1) adjustment signal (sβ1) based on the first maximal speed signal; adjusting the pitch angle (β) of the rotor blade to a first pitch angle (β1) based on the first pitch angle adjustment signal; then obtaining a second maximal speed signal indicative of a second desired maximal rotational speed of the rotation shaft different from the first desired maximal rotational speed of the rotation shaft; deriving a second pitch angle (β2) adjustment signal (sβ2) based on the second maximal speed signal, wherein the second pitch angle adjustment signal is different from the first pitch angle adjustment signal; and adjusting the pitch angle of the rotor blade to a second pitch angle (β2) based on the second pitch angle adjustment signal, wherein the second desired maximal rotational speed is smaller than the first desired maximal rotational speed, wherein the second pitch angle (β2) is greater than the first pitch angle (β1), wherein the first pitch angle (β1) and the second pitch angle (β2) are constant for power output below a threshold (th3, th5, th7, th9), wherein the first pitch angle is the optimal pitch angle to maximize power production, when the maximal rotational speed of the rotation shaft is set to the first desired maximal rotational speed of the rotation shaft, wherein the second pitch angle is the optimal pitch angle to maximize the power production, when the maximal rotational speed of the rotation shaft is set to the second desired maximal rotational speed of the rotation shaft, the method further comprising: obtaining a power signal (p) indicative of a power output, wherein the deriving the first pitch angle adjustment signal is further based on the power signal, wherein the deriving the second pitch angle adjustment signal is further based on the power signal. obtaining a first maximal speed signal indicative of the first desired maximal rotational speed of the rotation shaft; deriving a first pitch angle (β1) adjustment signal (sβ1) based on the first maximal speed signal; adjusting the pitch angle (β) of the rotor blade to a first pitch angle (β1) based on the first pitch angle adjustment signal; then obtaining a second maximal speed signal indicative of a second desired maximal rotational speed of the rotation shaft different from the first desired maximal rotational speed of the rotation shaft; deriving a second pitch angle (β2) adjustment signal (sβ2) based on the second maximal speed signal, wherein the second pitch angle adjustment signal is different from the first pitch angle adjustment signal; and adjusting the pitch angle of the rotor blade to a second pitch angle (β2) based on the second pitch angle adjustment signal, wherein the second desired maximal rotational speed is smaller than the first desired maximal rotational speed, wherein the second pitch angle (β2) is greater than the first pitch angle (β1), wherein the first pitch angle (β1) and the second pitch angle (β2) are constant for power output below a threshold (th3, th5, th7, th9), wherein the first pitch angle is the optimal pitch angle to maximize power production, when the maximal rotational speed of the rotation shaft is set to the first desired maximal rotational speed of the rotation shaft, wherein the second pitch angle is the optimal pitch angle to maximize the power production, when the maximal rotational speed of the rotation shaft is set to the second desired maximal rotational speed of the rotation shaft, obtaining a power signal (p) indicative of a power output, wherein the deriving the first pitch angle adjustment signal is further based on the power signal, wherein the deriving the second pitch angle adjustment signal is further based on the power signal.