diff --git a/docs/Doxyfile b/docs/Doxyfile
index 0299bfa06..42b137d91 100644
--- a/docs/Doxyfile
+++ b/docs/Doxyfile
@@ -4,7 +4,7 @@
 # Project related configuration options
 #---------------------------------------------------------------------------
 PROJECT_NAME           = ChibiOS/RT
-PROJECT_NUMBER         = "0.5.2 beta"
+PROJECT_NUMBER         = "0.5.3 beta"
 OUTPUT_DIRECTORY       = .
 CREATE_SUBDIRS         = NO
 OUTPUT_LANGUAGE        = English