diff --git a/sopare/filter.py b/sopare/filter.py
index 5460e56..04bd873 100644
--- a/sopare/filter.py
+++ b/sopare/filter.py
@@ -131,7 +131,7 @@ def filter(self, data, meta):
         characteristic = self.characteristic.getcharacteristic(fft, normalized, meta)
 
         if (shift_fft != None and (hasattr(sopare.config, 'FFT_SHIFT') and sopare.config.FFT_SHIFT == True)):
-            shift_fft[soopare.config.HIGH_FREQ:] = 0
+            shift_fft[sopare.config.HIGH_FREQ:] = 0
             shift_fft[:sopare.config.LOW_FREQ] = 0
             shift_data = numpy.fft.irfft(shift_fft)
             shift_nfft = fft[sopare.config.LOW_FREQ:sopare.config.HIGH_FREQ]
diff --git a/sopare/version.py b/sopare/version.py
index e90e828..6179416 100644
--- a/sopare/version.py
+++ b/sopare/version.py
@@ -1,2 +1,2 @@
-__version__ = "1.3.7"
+__version__ = "1.3.8"