diff --git a/doxygen/input/doc_mainpage.h b/doxygen/input/doc_mainpage.h
index bbf4ea2..d19f93e 100644
--- a/doxygen/input/doc_mainpage.h
+++ b/doxygen/input/doc_mainpage.h
@@ -22,7 +22,7 @@
  */
 
 /**
- * @mainpage Mbed TLS v2.28.3 API Documentation
+ * @mainpage Mbed TLS v2.28.4 API Documentation
  *
  * This documentation describes the internal structure of Mbed TLS.  It was
  * automatically generated from specially formatted comment blocks in