diff --git a/Doxyfile b/Doxyfile
index c857ee27f5..8e9a80e8a9 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -38,7 +38,7 @@ PROJECT_NAME           = JKQTPlotter
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = v4.0.0
+PROJECT_NUMBER         = trunk/v5.0.0
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a