diff --git a/SOURCE b/SOURCE
index 0ec60ce8b55f09acc3dad71a616161d401061eb7..ce16aaf32c920b8f63efbe92ff9b886447b1da80 100644
--- a/SOURCE
+++ b/SOURCE
@@ -1 +1 @@
-5.10.0-4.8.0
+5.10.0-4.9.0
diff --git a/kernel.spec b/kernel.spec
index d2321babf66015d34fdda49474cebd3eb1a946d8..2f6cd2ded696cc259f27461f7ecd3db3b365e41d 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -11,8 +11,8 @@
 %global upstream_version    5.10
 %global upstream_sublevel   0
 %global devel_release       4
-%global maintenance_release .8.0
-%global pkg_release         .20
+%global maintenance_release .9.0
+%global pkg_release         .21
 
 %define with_debuginfo 1
 # Do not recompute the build-id of vmlinux in find-debuginfo.sh
@@ -869,6 +869,10 @@ fi
 %endif
 
 %changelog
+* Mon Mar 8 2021 Zheng Zengkai <zhengzengkai@huawei.com> - 5.10.0-4.9.0.21
+- arm64: ipi_nmi: fix compile error when CONFIG_KGDB is disabled
+- kbuild: fix compile error in Makefile.lib
+
 * Fri Mar 5 2021 Zheng Zengkai <zhengzengkai@huawei.com> - 5.10.0-4.8.0.20
 - kbuild: keep the original function for non-RPi
 - arm64: keep the original function for non-RPi