diff --git a/Readme.md b/Readme.md
index 6990420..3097c79 100644
--- a/Readme.md
+++ b/Readme.md
@@ -1,3 +1,3 @@
-Know issue:
+## Know issue:
 1 visdom  requests.exceptions.ConnectionError: HTTPConnectionPool(host='localhost', port=8097):
   ==> You may need run "python -m visdom.server" at first in a new mechine.
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