diff --git a/Omeka-core.md b/Omeka-core.md
index ea8af51..8a0a048 100644
--- a/Omeka-core.md
+++ b/Omeka-core.md
@@ -1,3 +1,7 @@
+# Core modifications
+
+We have tried to avoid this as much as possible. However..
+
 Things to do after upgrading the Omeka core.
 
 ## Disable blocks