diff --git a/SUMMARY.md b/SUMMARY.md
index d6e2209..ec009de 100644
--- a/SUMMARY.md
+++ b/SUMMARY.md
@@ -28,6 +28,10 @@
 * [What is the Launchpad](launchpad/what-is-the-launchpad.md)
 * [Using the Launchpad](launchpad/using-the-launchpad.md)
 
+## 💰 BRC20 On-chain Indexer
+
+* [What is the BRC20 On-chain Indexer](brc20-on-chain-indexer/what-is-the-brc20-on-chain-indexer.md)
+
 ## 📚 Whitepaper
 
 * [Automated Market Making of Trading Pool](whitepaper/automated-market-making-of-alex/README.md)
@@ -42,7 +46,3 @@
   * [Token List](developers/smart-contracts/token-list.md)
   * [AMM Pool Mapping](developers/smart-contracts/amm-pool-mapping.md)
 * [API References](developers/api-references.md)
-
-## 💰 BRC20 On-chain Indexer
-
-* [What is the BRC20 On-chain Indexer](brc20-on-chain-indexer/what-is-the-brc20-on-chain-indexer.md)