diff --git a/developer_manual/app/index.rst b/developer_manual/app/index.rst
index 3e65ef8a7..3708dfaea 100644
--- a/developer_manual/app/index.rst
+++ b/developer_manual/app/index.rst
@@ -1,8 +1,8 @@
 .. _appindex:
 
-================
-App Developement
-================
+===============
+App Development
+===============
 
 .. toctree::
    :maxdepth: 1