Redraw semilogy without tick movement

I have the following code drawing to a GUI

for i = 1:3000
    [x, y] = getFFT(inlet, x);
    axes(handles.spectrogram);
    semilogy(w, y*.01);
    axis([0 125 0 100]);
    set(gca, 'YTick', [0 10 100], 'YTickLabel', {0 10 100})
    xlabel('Frequency (Hz)');
    ylabel('Amplitude (microvolts)');
    set(gca, 'YTickLabel', {0 10 100});
    hold on;

Each time this is plotted, I would like the Y-axis ticks to remain in the same position. Instead, they jump around a bit depending on the natural of the Fourier transform (y). Is there a way to get around this? Namely, I'd like the ticks not to move from their starting position.