diff --git "a/contents/AsyncDisplayKit/\344\273\216 Auto Layout \347\232\204\345\270\203\345\261\200\347\256\227\346\263\225\350\260\210\346\200\247\350\203\275.md" "b/contents/AsyncDisplayKit/\344\273\216 Auto Layout \347\232\204\345\270\203\345\261\200\347\256\227\346\263\225\350\260\210\346\200\247\350\203\275.md"
index 3db04db..aff99d4 100644
--- "a/contents/AsyncDisplayKit/\344\273\216 Auto Layout \347\232\204\345\270\203\345\261\200\347\256\227\346\263\225\350\260\210\346\200\247\350\203\275.md"	
+++ "b/contents/AsyncDisplayKit/\344\273\216 Auto Layout \347\232\204\345\270\203\345\261\200\347\256\227\346\263\225\350\260\210\346\200\247\350\203\275.md"	
@@ -302,7 +302,7 @@ ASDK 的文档中推荐在子类中覆写 `- layoutSpecThatFits:` 方法，返
 
 ## References
 
-+ [Cassowary, Cocoa Auto Layout, and enaml constraints](http://stacks.11craft.com/cassowary-cocoa-Auto Layout-and-enaml-constraints.html)
++ [Cassowary, Cocoa Auto Layout, and enaml constraints](http://stacks.11craft.com/cassowary-cocoa-autolayout-and-enaml-constraints.html)
 + [Solving constraint systems](http://cassowary.readthedocs.io/en/latest/topics/theory.html)
 + [Auto Layout Performance on iOS](http://floriankugler.com/2013/04/22/auto-layout-performance-on-ios/)
 + [The Cassowary Linear Arithmetic Constraint Solving Algorithm: Interface and Implementation](https://constraints.cs.washington.edu/cassowary/cassowary-tr.pdf)