diff --git a/tutorials/BasicTutorial.py b/tutorials/BasicTutorial.py
index fcdeed337c231101838693b3c0282dd60157aeef..953a8e953305a2d71c999e197d27c264af0f0072 100644
--- a/tutorials/BasicTutorial.py
+++ b/tutorials/BasicTutorial.py
@@ -7,6 +7,7 @@ comoving volume prior on luminosity distance, the cosmology is WMAP7.
 """
 from __future__ import division, print_function
 import peyote
+import numpy as np
 
 peyote.utils.setup_logger(log_level="info")