diff --git a/utils/json2graph.py b/utils/json2graph.py
index f9ae27d..8992382 100755
--- a/utils/json2graph.py
+++ b/utils/json2graph.py
@@ -7,7 +7,7 @@ Licensed under MPL-2.0 (see docs/LICENSE.MPL-2.0)
 '''
 
 # a bar plot with errorbars
-import sys, json, pprint
+import sys, json
 import numpy as np
 import matplotlib.pyplot as plt
 from matplotlib.font_manager import FontProperties