diff --git a/TODO.md b/TODO.md
index 4f14d40..672664a 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,3 +1,7 @@
+# 4.4 Dependencies Improve Search
+
+> https://github.com/cicada-lang/propagator/issues/4
+
 # mimor
 
 [mimor] 4 Dependencies
@@ -5,10 +9,6 @@
 [mimor] 6 Towards a Programming Language
 [mimor] 7 Philosophical Insights
 
-# 4.4 Dependencies Improve Search
-
-> https://github.com/cicada-lang/propagator/issues/4
-
 # 完成 "The Art" 中的 Heron 例子
 
 > - 需要设计 lattice 来逼近结果