diff --git a/utils.py b/utils.py
index ab4beb3b3..64cc2cf3b 100644
--- a/utils.py
+++ b/utils.py
@@ -5,6 +5,8 @@
 from pandas.api.types import CategoricalDtype
 
 import matplotlib as mpl
+import json
+
 # mpl.rcParams['figure.dpi']= 200
 mpl.rcParams['savefig.dpi']= 200
 mpl.rcParams['font.size']=12