diff --git a/src/sys.c b/src/sys.c
index 045f374..a435d68 100644
--- a/src/sys.c
+++ b/src/sys.c
@@ -7,9 +7,9 @@
 #define KRK_VERSION_MINOR  4
 #define KRK_VERSION_PATCH  0
 #define KRK_VERSION_LEVEL  0xb
-#define KRK_VERSION_SERIAL 0x1
+#define KRK_VERSION_SERIAL 0x2
 
-#define KRK_VERSION_EXTRA_BASE  "b1"
+#define KRK_VERSION_EXTRA_BASE  "b2"
 
 #ifndef KRK_STATIC_ONLY
 #define KRK_VERSION_EXTRA KRK_VERSION_EXTRA_BASE