diff --git a/physioqc/interfaces/interfaces.py b/physioqc/interfaces/interfaces.py
index 4c5d587..7181d4e 100644
--- a/physioqc/interfaces/interfaces.py
+++ b/physioqc/interfaces/interfaces.py
@@ -1,9 +1,8 @@
 import os
 
-import matplotlib.pyplot as plt
 import pandas as pd
 
-from physioqc.metrics.multimodal import peak_amplitude, peak_detection, peak_distance
+from ..metrics.multimodal import peak_amplitude, peak_detection, peak_distance
 
 
 def generate_figures(figures, data, outdir):
diff --git a/physioqc/metrics/multimodal.py b/physioqc/metrics/multimodal.py
index 110f8de..0518589 100644
--- a/physioqc/metrics/multimodal.py
+++ b/physioqc/metrics/multimodal.py
@@ -5,7 +5,6 @@
 import numpy as np
 import peakdet as pk
 from scipy import signal
-from scipy.misc import derivative
 
 from .utils import has_peakfind_physio, physio_or_numpy
 
diff --git a/physioqc/workflow.py b/physioqc/workflow.py
index d2d8b66..c377105 100644
--- a/physioqc/workflow.py
+++ b/physioqc/workflow.py
@@ -5,15 +5,15 @@
 import numpy as np
 import peakdet as pk
 
-from physioqc.cli.run import _get_parser
-from physioqc.interfaces.interfaces import generate_figures, run_metrics, save_metrics
-from physioqc.interfaces.visualizations import (
+from .cli.run import _get_parser
+from .interfaces.interfaces import generate_figures, run_metrics, save_metrics
+from .interfaces.visualizations import (
     plot_average_peak,
     plot_histogram,
     plot_power_spectrum,
     plot_raw_data,
 )
-from physioqc.metrics.multimodal import (
+from .metrics.multimodal import (
     fALFF,
     freq_energy,
     max,