diff --git a/Core_DOM/ROOT b/Core_DOM/ROOT
index b1ad135..1b1a730 100644
--- a/Core_DOM/ROOT
+++ b/Core_DOM/ROOT
@@ -1,6 +1,6 @@
 chapter AFP
 
-session "Core_DOM" (AFP) = "HOL-Library" + 
+session "Core_DOM-devel" (AFP) = "HOL-Library" + 
   options [timeout = 4800, document = pdf, document_variants="document:outline=/proof,/ML",document_output=output]
   theories
     Core_DOM