diff --git a/cara/montecarlo.py b/cara/montecarlo.py
index de0da6bf..abf09c57 100644
--- a/cara/montecarlo.py
+++ b/cara/montecarlo.py
@@ -3,6 +3,7 @@ import functools
 from cara import models
 import numpy as np
 import scipy.stats as sct
+from scipy.integrate import quad_vec
 import typing
 import matplotlib.pyplot as plt
 import matplotlib.patches as patches