diff --git a/config/common.mk b/config/common.mk
index 4ecb2a0..f608b07 100644
--- a/config/common.mk
+++ b/config/common.mk
@@ -166,7 +166,7 @@
 # SlimLP first version.
 PRODUCT_VERSION_MAJOR = 5.1.1
 PRODUCT_VERSION_MINOR = beta
-PRODUCT_VERSION_MAINTENANCE = 0.3
+PRODUCT_VERSION_MAINTENANCE = 0.4
 ifdef SLIM_BUILD_EXTRA
     SLIM_POSTFIX := -$(SLIM_BUILD_EXTRA)
 endif