diff --git a/SM4性能优化.md b/SM4性能优化.md
index 0794d3a..916c81c 100644
--- a/SM4性能优化.md
+++ b/SM4性能优化.md
@@ -2,4 +2,5 @@
 
 参考资料：
 * [SM4的快速软件实现技术](https://m.doc88.com/p-1823908753601.html)
-* [SM4的快速软件实现技术](http://html.rhhz.net/ZGKXYDXXB/20180205.htm)
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+* [SM4的快速软件实现技术](http://html.rhhz.net/ZGKXYDXXB/20180205.htm)
+* [sm4ni](https://github.com/mjosaarinen/sm4ni)
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