diff --git a/README.md b/README.md
index b2068f2..c7e295b 100644
--- a/README.md
+++ b/README.md
@@ -234,4 +234,4 @@ python3 test3.py
 ```
 
 ## 许可证
-NKDBsec代码库基于[GNU Lesser General Public License v3.0]()许可证开放使用。
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+NKDBsec代码库基于[GNU Lesser General Public License v3.0](https://www.osredm.com/nankaicyber/NKDBsec/tree/master/COPYING.LESSER)许可证开放使用。
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