diff --git a/meta-raspberrypi/README.md b/meta-raspberrypi/README.md
index 6c4e1e4..898426d 100644
--- a/meta-raspberrypi/README.md
+++ b/meta-raspberrypi/README.md
@@ -50,15 +50,15 @@
 2. Add this layer to bblayers.conf and the dependencies above
 3. Set MACHINE in local.conf to one of the supported boards
 4. bitbake core-image-base
-5. dd to a SD card the generated sdimg file (use xzcat if rpi-sdimg.xz is used)
-6. Boot your RPI.
+5. Use bmaptool to copy the generated .wic.bz2 file to the SD card
+6. Boot your RPI
 
 ## Quick Start with kas
 
 1. Install kas build tool from PyPi (sudo pip3 install kas)
 2. kas build meta-raspberrypi/kas-poky-rpi.yml
-3. dd to a SD card the generated sdimg file (use xzcat if rpi-sdimg.xz is used)
-4. Boot your RPI.
+3. Use bmaptool to copy the generated .wic.bz2 file to the SD card
+4. Boot your RPI
 
 To adjust the build configuration with specific options (I2C, SPI, ...), simply add
 a section as follows:
diff --git a/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi_5.4.bb b/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi_5.4.bb
index 9eeb1ee..ec0767e 100644
--- a/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi_5.4.bb
+++ b/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi_5.4.bb
@@ -1,7 +1,7 @@
-LINUX_VERSION ?= "5.4.35"
+LINUX_VERSION ?= "5.4.40"
 LINUX_RPI_BRANCH ?= "rpi-5.4.y"
 
-SRCREV = "a5eaf73c42b06af4e8ec52755fdfa1cad05a4ac8"
+SRCREV = "97badb4baeb8999263a9bc2fa85c3060ffff344b"
 
 require linux-raspberrypi_5.4.inc