diff --git a/py_neuromodulation/nm_sharpwaves.py b/py_neuromodulation/nm_sharpwaves.py
index 36c86df2..1a6fdb58 100644
--- a/py_neuromodulation/nm_sharpwaves.py
+++ b/py_neuromodulation/nm_sharpwaves.py
@@ -143,7 +143,7 @@ def calc_feature(
                 if filter_name == "no_filter":
                     self.data_process_sw = data[ch_idx, :]
                 else:
-                    self.data_process_sw = signal.convolve(
+                    self.data_process_sw = signal.fftconvolve(
                         data[ch_idx, :], filter, mode="same"
                     )