diff --git a/pywb/indexer/cdxindexer.py b/pywb/indexer/cdxindexer.py
index 3ce26d0d4..bcbe289a3 100644
--- a/pywb/indexer/cdxindexer.py
+++ b/pywb/indexer/cdxindexer.py
@@ -27,7 +27,6 @@ def json_encode(obj):
 
 
 from argparse import ArgumentParser, RawTextHelpFormatter
-from bisect import insort
 
 from six import StringIO
 
@@ -167,9 +166,10 @@ def write(self, entry, filename):
         super(SortedCDXWriter, self).write(entry, filename)
         line = self.out.getvalue()
         if line:
-            insort(self.sortlist, line)
+            self.sortlist.append(line)
 
     def __exit__(self, *args):
+        self.sortlist.sort()
         self.actual_out.write(''.join(self.sortlist))
         return False