diff --git a/code/chirpdetection.py b/code/chirpdetection.py
index b1e232c..0972504 100644
--- a/code/chirpdetection.py
+++ b/code/chirpdetection.py
@@ -3,7 +3,6 @@ import os
 import numpy as np
 from IPython import embed
 import matplotlib.pyplot as plt
-from scipy.stats import iqr
 from scipy.signal import find_peaks
 from scipy.ndimage import gaussian_filter1d
 from thunderfish.dataloader import DataLoader
diff --git a/code/chirpdetector_conf.yml b/code/chirpdetector_conf.yml
index b60518c..409dc9c 100644
--- a/code/chirpdetector_conf.yml
+++ b/code/chirpdetector_conf.yml
@@ -13,7 +13,7 @@ search_boundary: 100
 envelope_cutoff: 25
 
 # Cutoff frequency for envelope highpass filter
-envelope_highpass_cutoff: 4
+envelope_highpass_cutoff: 3
 
 # Cutoff frequency for envelope of envelope
 envelope_envelope_cutoff: 5