diff --git a/Doxygenfile b/Doxygenfile
index 00ed2fcc..047de14f 100644
--- a/Doxygenfile
+++ b/Doxygenfile
@@ -38,13 +38,13 @@ PROJECT_NAME           =
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = 2.1
+PROJECT_NUMBER         = 2.2
 
 # 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
 # quick idea about the purpose of the project. Keep the description short.
 
-PROJECT_BRIEF          = "version 2.1"
+PROJECT_BRIEF          = "version 2.2"
 
 # With the PROJECT_LOGO tag one can specify an logo or icon that is included in
 # the documentation. The maximum height of the logo should not exceed 55 pixels