diff --git a/pyrelacs/repros/calbi.py b/pyrelacs/repros/calbi.py
index 78e18f0..9765bef 100644
--- a/pyrelacs/repros/calbi.py
+++ b/pyrelacs/repros/calbi.py
@@ -6,8 +6,6 @@ import uldaq
 from IPython import embed
 import numpy as np
 import matplotlib.pyplot as plt
-from scipy.signal import welch
-from scipy.signal import find_peaks
 
 from pyrelacs.devices.mccdaq import MccDaq
 from pyrelacs.util.logging import config_logging