diff --git a/bigbang/analysis/utils.py b/bigbang/analysis/utils.py
index e0af3b9..abaf58f 100644
--- a/bigbang/analysis/utils.py
+++ b/bigbang/analysis/utils.py
@@ -1,4 +1,3 @@
-import datetime
 from datetime import datetime
 import math
 import os