diff --git a/source/source_main/version.h b/source/source_main/version.h
index c896684d3c..cdc85ca54d 100644
--- a/source/source_main/version.h
+++ b/source/source_main/version.h
@@ -1,3 +1,3 @@
 #ifndef VERSION
-#define VERSION "v3.9.0.20"
+#define VERSION "v3.9.0.21"
 #endif