diff --git a/doc/dev/dolibarr-doxygen.conf b/doc/dev/dolibarr-doxygen.conf
index 8c697f2b3f2..521bb75d14a 100644
--- a/doc/dev/dolibarr-doxygen.conf
+++ b/doc/dev/dolibarr-doxygen.conf
@@ -8,7 +8,7 @@
 # Project related configuration options
 #---------------------------------------------------------------------------
 PROJECT_NAME           = dolibarr
-PROJECT_NUMBER         = 2.1.0
+PROJECT_NUMBER         = 2.2.0
 OUTPUT_DIRECTORY       = doc/dev
 CREATE_SUBDIRS         = NO
 OUTPUT_LANGUAGE        = English