diff --git a/README.md b/README.md
index b6f4304..44c2d1b 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,8 @@ pip install durable_rules
 from durable.lang import *
 ```
 
+# Basic
+
 <details>
 <summary>Rules (Trigger: @when_all(==, &, <<))</summary>
 <div markdown="1">
@@ -306,7 +308,7 @@ retract_fact('risk', { 'sid': 1, 't': 'balance' })
 </div>
 </details>
 <details>
-<summary>Nested OBjects</summary>
+<summary>Nested Objects</summary>
 <div markdown="1">
 
 * 중첩된 이벤트 또는 사실에 대한 질의도 지원됩니다.
@@ -545,7 +547,7 @@ post('flow', { 'action': 'start' })
 </div>
 </details>
 
-### Flow Structures
+# Flow Structures
 
 <details>
 <summary>Statechart</summary>