diff --git a/README.md b/README.md
index f0d37fe..a4e6931 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@
 | FibonacciSequence       | 斐波那契数列             | [fibonacci-sequence](https://hatter.ink/static/resource/muboard/?id=fibonacci-sequence&version=latest&full=1)               |
 | LeibnizFormula          | $\pi$ 的莱布尼茨公式      | [leibniz-formula](https://hatter.ink/static/resource/muboard/?id=leibniz-formula&version=1)                                 |
 | ModularInv              | 求乘法逆元【扩展欧几里得法】     | -                                                                                                                           |
-| -                       | 牛顿迭代法              | [newtons-method](https://hatter.ink/static/resource/muboard/?id=newtons-method&version=latest&full=1)                       |
+| MathUtil#sqrt           | 牛顿迭代法              | [newtons-method](https://hatter.ink/static/resource/muboard/?id=newtons-method&version=latest&full=1)                       |
 | NormalDistribution      | 正态分布               | [normal-distribution](https://hatter.ink/static/resource/muboard/?id=normal-distribution&version=latest&full=1)             |
 | Prime                   | 试除法                | -                                                                                                                           |
 | Sqrt10                  | 求 $\sqrt{10}$【连分数】 | [resolve-sqrt-10](https://hatter.ink/static/resource/muboard/?id=resolve-sqrt-10&version=latest&full=1)                     |