diff --git a/README.md b/README.md
index 9e609a1..ce6d565 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,7 @@
     1.5. [Process Monitoring Operations (TODO)](#15-process-monitoring-operations)
   2. [Basic Shell Programming](#2-basic-shell-programming)  
     2.1. [Variables](#21-variables)  
+    2.2  [Array](#22-array)  
     2.3. [String Substitution](#22-string-substitution)  
     2.4. [Functions](#23-functions)  
     2.5. [Conditionals](#24-conditionals)