diff --git a/build.sh b/build.sh
index 4b166d9..457fb46 100644
--- a/build.sh
+++ b/build.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
-MAINLINE_KERNEL_VERSION=6.6.2
-MAINLINE_KERNEL_SOURCE_URL=https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-6.6.2.tar.xz
+MAINLINE_KERNEL_VERSION=6.6.3
+MAINLINE_KERNEL_SOURCE_URL=https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-6.6.3.tar.xz
 CHROMEOS_KERNEL_VERSION=5.10.199
 CHROMEOS_KERNEL_SOURCE_URL=https://chromium.googlesource.com/chromiumos/third_party/kernel.git/+archive/refs/heads/release-R120-15662.B-chromeos-5.10.tar.gz
 
diff --git a/kernel-configs/mainline/combined-kernel.conf b/kernel-configs/mainline/combined-kernel.conf
index a76be38..70e5347 100644
--- a/kernel-configs/mainline/combined-kernel.conf
+++ b/kernel-configs/mainline/combined-kernel.conf
@@ -1,6 +1,6 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/x86 6.6.2 Kernel Configuration
+# Linux/x86 6.6.3 Kernel Configuration
 #
 CONFIG_CC_VERSION_TEXT="gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
 CONFIG_CC_IS_GCC=y