diff --git a/README.md b/README.md
index 5d21c12..cb3f2ad 100644
--- a/README.md
+++ b/README.md
@@ -6,8 +6,8 @@ This addon can be used to easily up- and downgrade the RaspberryMatic system.
 
 ## Installation
 * Download adjusted RaspberryMatic image:
-  * [RaspberryMatic-2.31.25.20180120-rpi0.rmupdate.img.zip](https://www.dropbox.com/s/cath33kfhvyj5fh/RaspberryMatic-2.31.25.20180120-rpi0.rmupdate.img.zip) SHA256 sum: 6b8b4cfebadf27606205b077cdd2160cb7271c133a64604ab19b7109ff595191
-  * [RaspberryMatic-2.31.25.20180120-rpi3.rmupdate.img.zip](https://www.dropbox.com/s/lk9thxla660pmje/RaspberryMatic-2.31.25.20180120-rpi3.rmupdate.img.zip) SHA256 sum: e51b93e3c84ae40dfaef2c14e91e4691f423e3d3dc4be3d4e5e5137ab0192016
+  * [RaspberryMatic-2.31.25.20180120-rpi0.rmupdate.img.zip](https://www.dropbox.com/s/zvtdsky7975b77c/RaspberryMatic-2.31.25.20180120-rpi0.rmupdate.img.zip) SHA256 sum: 8861c94201080438aa12a1a175976037eec10754d15fb40604dc2ff7de351094
+  * [RaspberryMatic-2.31.25.20180120-rpi3.rmupdate.img.zip](https://www.dropbox.com/s/js9exepqj4mvfok/RaspberryMatic-2.31.25.20180120-rpi3.rmupdate.img.zip) SHA256 sum: 83877c057deb68026283d71512c1da0780f747cc98fa89e898af584d3b079371
 * Install adjusted RaspberryMatic image like described at [RaspberryMatic project](https://github.com/jens-maus/RaspberryMatic)
 * Download [addon package](https://github.com/j-a-n/raspberrymatic-addon-rmupdate/raw/master/rmupdate.tar.gz)
 * Install addon package on RaspberryMatic via system control
diff --git a/adjust_image.sh b/adjust_image.sh
index f13751a..3abe6bc 100755
--- a/adjust_image.sh
+++ b/adjust_image.sh
@@ -3,7 +3,7 @@
 LOOP_DEV=7
 BOOT_SIZE=$((250*1024*1024))
 ROOT_SIZE=$((1000*1024*1024))
-USR_LOCAL_SIZE=$((2*1024*1024))
+USR_LOCAL_SIZE=$((4*1024*1024))
 
 if [[ $EUID -ne 0 ]]; then
 	echo "This script must be run as root." 1>&2
@@ -28,13 +28,14 @@ echo "image: ${image_file}"
 echo "adjusted image: ${new_image_file}"
 
 echo "*** Creating new image file and partitions ***"
-dd if=/dev/zero of=$new_image_file bs=1M count=$((((${BOOT_SIZE}+${ROOT_SIZE}+${ROOT_SIZE}+${USR_LOCAL_SIZE})/1024/1024)+1))
+dd if=/dev/zero of=$new_image_file bs=512 count=$(( ((${part_start}+${BOOT_SIZE}+${ROOT_SIZE}+${ROOT_SIZE}+${USR_LOCAL_SIZE})/512) ))
+
 parted --script $new_image_file \
 	mklabel msdos \
-	mkpart primary fat32 ${part_start}B ${BOOT_SIZE}B \
+	mkpart primary fat32 ${part_start}B $((${part_start}+${BOOT_SIZE}-512))B \
 	set 1 boot on \
-	mkpart primary ext4 $((${part_start}+${BOOT_SIZE}))B $((${BOOT_SIZE}+${ROOT_SIZE}))B \
-	mkpart primary ext4 $((${part_start}+${BOOT_SIZE}+${ROOT_SIZE}))B $((${BOOT_SIZE}+${ROOT_SIZE}+${ROOT_SIZE}))B \
+	mkpart primary ext4 $((${part_start}+${BOOT_SIZE}))B $((${part_start}+${BOOT_SIZE}+${ROOT_SIZE}-512))B \
+	mkpart primary ext4 $((${part_start}+${BOOT_SIZE}+${ROOT_SIZE}))B $((${part_start}+${BOOT_SIZE}+${ROOT_SIZE}+${ROOT_SIZE}-512))B \
 	mkpart primary ext4 $((${part_start}+${BOOT_SIZE}+${ROOT_SIZE}+${ROOT_SIZE}))B 100%
 
 echo "*** Copying original partitons ***"
@@ -107,12 +108,18 @@ rmdir /tmp/rmupdate.mnt
 #fatresize --size $BOOT_SIZE /dev/mapper/loop${LOOP_DEV}p1
 
 sleep 3
+
+echo "resize /dev/mapper/loop${LOOP_DEV}p2"
 fsck.ext4 -f -y /dev/mapper/loop${LOOP_DEV}p2 || true
 resize2fs /dev/mapper/loop${LOOP_DEV}p2
 tune2fs -L rootfs1 /dev/mapper/loop${LOOP_DEV}p2
 sleep 3
+
+echo "mkfs /dev/mapper/loop${LOOP_DEV}p3"
 mkfs.ext4 -L rootfs2 /dev/mapper/loop${LOOP_DEV}p3 || true
 sleep 3
+
+echo "resize /dev/mapper/loop${LOOP_DEV}p4"
 fsck.ext4 -f -y /dev/mapper/loop${LOOP_DEV}p4 || true
 resize2fs /dev/mapper/loop${LOOP_DEV}p4