diff --git a/utils.py b/utils.py
index 982a225a09599d45c7f85ee22ce7c83ee4668514..245f8b9d15882a6a33d90012e7533770e213bef6 100755
--- a/utils.py
+++ b/utils.py
@@ -115,7 +115,7 @@ def create_spectrogram(sig, directory, names, cmap, minimum, window_size=1024, o
         vmin = stft.min()
     # plot the spectrogram
     plt.imshow(stft[::-1], aspect='auto',
-               interpolation=None, cmap=cmap) # you can add : vmin=vmin)
+               interpolation=None, cmap=cmap, vmin=vmin)
     # Remove all the borders around the plot
     plt.subplots_adjust(top=1, bottom=0, left=0, right=1)
     if names: