update security doc
diff --git a/content/en/docs/notices/security.md b/content/en/docs/notices/security.md
index e7428fe..bb6983c 100755
--- a/content/en/docs/notices/security.md
+++ b/content/en/docs/notices/security.md
@@ -46,7 +46,7 @@
Do not expose the open port of Dubbo server to the public network. But pay attention to the exceptional, if the attacker is in the Intranet environment, he can still attack.
-* Enable filtering of incoming serialization data for Java default serialization
+* Enable filtering of incoming serialization data for Java default serialization
Remember to configure filtering rules before enabling Java default serialization.
This feature is first supported in JDK 9 and has been back-ported to JDK 8, 7, and 6.
https://docs.oracle.com/javase/10/core/serialization-filtering1.htm#JSCOR-GUID-3ECB288D-E5BD-4412-892F-E9BB11D4C98A
