diff --git a/GNUmakefile b/GNUmakefile
index 0856a98b..9cc0182b 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -26,7 +26,7 @@ ENABLE_ARM=0
 
 -include user-config.make
 
-MSI_VERSION=9.1.0
+MSI_VERSION=9.1.99
 
 # variables
 SRCDIR_ABS=$(shell cd $(SRCDIR); pwd)