diff --git a/tutorial.md b/tutorial.md
index e8137c9..1fe2e7d 100644
--- a/tutorial.md
+++ b/tutorial.md
@@ -42,7 +42,7 @@ This document contains a series of several sections, each of which explains a pa
 -  [3.0 Birthday training](#dockercompetition)
   - [3.1 Pull voting-app images](#pullimage)
   - [3.2 Customize the App](#customize)
-                - [3.2.1 Modify app.py](#modifyapp)
+    - [3.2.1 Modify app.py](#modifyapp)
     - [3.2.2 Modify config.json](#modifyconfig)
     - [3.2.3 Building and running the app](#buildvotingapp)
     - [3.2.4 Build and tag images](#buildandtag)