diff --git a/rrd/export-rrd.py b/rrd/export-rrd.py
index 18a7d42..4c30253 100755
--- a/rrd/export-rrd.py
+++ b/rrd/export-rrd.py
@@ -1,54 +1,54 @@
 #!/usr/bin/env python
 
 """Script to execute the export of softwareheritage's rrds data.
 
 """
 
 import click
 import os
 import subprocess
 
 DIRPATH='/var/lib/munin/softwareheritage.org/'
 FILENAME_PATTERN="prado.softwareheritage.org-softwareheritage_objects_softwareheritage-###-g.rrd"
 # The data source used to create the rrd file
 DS=42
 
 ENTITIES=[
     "content",
     "directory_entry_dir",
     "directory_entry_file",
     "directory_entry_rev",
     "directory",
     "entity",
     "occurrence_history",
     "origin",
     "person",
     "project",
     "release",
     "revision",
     "revision_history",
     "skipped_content",
     "visit",
 ]
 
 @click.command()
 @click.option('--dirpath', default=DIRPATH)
 def main(dirpath):
     cmd=''
     for entity in ENTITIES:
         filename = FILENAME_PATTERN.replace('###', entity)
         filepath = os.path.join(dirpath, filename)
 
         if os.path.exists(filepath):
             cmd += ''' DEF:out-%s1="%s":%s:AVERAGE XPORT:out-%s1:"%s-avg" DEF:out-%s2="%s":%s:MIN XPORT:out-%s2:"%s-min" DEF:out-%s3="%s":%s:MAX XPORT:out-%s3:"%s-max"''' % (
                  entity, filepath, DS, entity, entity,
                  entity, filepath, DS, entity, entity,
                  entity, filepath, DS, entity, entity)
 
-    run_cmd = 'rrdtool xport --json %s' % (cmd, )
+    run_cmd = 'rrdtool xport --json --start 1431436580 --step 86400 %s' % (cmd, )
 
     subprocess.check_call(run_cmd, shell=True)
 
 
 if __name__ == '__main__':
     main()