Prepare for release 1.3.9
diff --git a/doxygen/input/doc_mainpage.h b/doxygen/input/doc_mainpage.h
index 0f36db7..426c1f3 100644
--- a/doxygen/input/doc_mainpage.h
+++ b/doxygen/input/doc_mainpage.h
@@ -4,7 +4,7 @@
  */
 
 /**
- * @mainpage PolarSSL v1.3.8 source code documentation
+ * @mainpage PolarSSL v1.3.9 source code documentation
  *
  * This documentation describes the internal structure of PolarSSL.  It was
  * automatically generated from specially formatted comment blocks in