diff --git a/app.py b/app.py
index 1ef2216..5efe066 100644
--- a/app.py
+++ b/app.py
@@ -17,7 +17,7 @@
 
 from dns_cache import _set_dns_cache
 
-GRADER_VERSION = '1.3'
+GRADER_VERSION = '1.3.1'
 
 if __name__ == '__main__':
     report_logger.info("QiwuGrader ver {0}".format(GRADER_VERSION))