diff --git a/developer_manual/core/index.rst b/developer_manual/core/index.rst
index a44efd4b5..ea5f74bf9 100644
--- a/developer_manual/core/index.rst
+++ b/developer_manual/core/index.rst
@@ -1,7 +1,7 @@
 .. _coreindex:
 
 =================
-Core Developement
+Core Development
 =================
 
 .. toctree::