diff --git a/README.md b/README.md
index 1527aa5..cf6de31 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ We conducted extensive experiments using widely recognized TREC query sets and m
   * [`search`](#search)
   * [`eval`](#eval)
   * [`agg`](#agg)
-- [3. File Structure](#4-file-structure)
+- [3. File Structure](#3-file-structure)
 - [4. Acknowledgement](#4-acknowledgement)
 - [5. License](#5-license)
 - [6. Citation](#6-citation)