diff --git a/docs/index.md b/docs/index.md
index 65807987d161d6cd0538758b1973bdac57dbcb76..ab68f392e0a81b0f089211c9039fb38ba2a18300 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -172,7 +172,9 @@ The `phen` command is used phenotype-related operations.
 
   - `-d`, `--phen-dir`: (Optional) Directory of current phenotype configuration (the default is ./build/phen).
   - `-old`, `--phen-dir-old`: (Required) Directory of old phenotype version)
- 
+
+# Development
+
 # GitLab Workflow for Managing Releases
 
 ## Branching Strategy