diff --git a/src/quickbook.cpp b/src/quickbook.cpp
index 6c9dc1e..f2a6b9b 100644
--- a/src/quickbook.cpp
+++ b/src/quickbook.cpp
@@ -34,7 +34,7 @@
 #pragma warning(disable:4355)
 #endif
 
-#define QUICKBOOK_VERSION "Quickbook Version 1.5.5"
+#define QUICKBOOK_VERSION "Quickbook Version 1.5.6 alpha"
 
 namespace quickbook
 {