diff --git a/utils/kernel-refresh.sh b/utils/kernel-refresh.sh
index 74f9cad5..c52bf04e 100755
--- a/utils/kernel-refresh.sh
+++ b/utils/kernel-refresh.sh
@@ -1,26 +1,24 @@
-#!/bin/sh
-
-KDIR=$1
-KTAG=$2
-PDIR=$3
+#!/bin/bash
 
 usage()
 {
     cat <<EOF
-usage: $0 <kernel-dir> [<kernel-tag>] [<patch-dir>]
+usage: $0 -k <kernel-dir> -o <old-version> [-t <kernel-tag>] [-p <patch-dir>] [-d <defconfig-dir>]
 
 Synchronize patches directory with changes from a GIT versioned kernel
 tree.
 
-  <kernel-dir>  Path to kernel tree.
+  -k <kernel-dir>    Path to kernel tree.
+  -o <old-version>   Version to be replaced by new kernel version.
+  -t <kernel-tag>    Base tag from which to generate patches. Default: "v"
+                     followed by the value of BR2_LINUX_KERNEL_VERSION in
+                     the current configuration.
+  -p <patch-dir>     Path to kernel patches directory. Default: the value of
+                     BR2_EXTERNAL_INFIX_PATH in the current configuration,
+                     followed by "/patches/linux/<kernel-tag>".
+  -d <defconfig-dir> Path to defconfig. Default the value of BR2_EXTERNAL_INFIX_PATH
+                     in the current configuration, followed by "/configs".
 
-  <kernel-tag>  Base tag from which to generate patches. Default: "v"
-                followed by the value of BR2_LINUX_KERNEL_VERSION in
-                the current configuration.
-
-  <patch-dir>   Path to kernel patches directory. Default: the value of
-                BR2_EXTERNAL_INFIX_PATH in the current configuration,
-                followed by "/patches/linux".
 EOF
 }
 
@@ -36,33 +34,53 @@ if [ $# -lt 1 ]; then
     exit 1
 fi
 
-if ! [ "$KTAG" ]; then
-     ixkver=$(getconfig BR2_LINUX_KERNEL_VERSION)
-    [ "$ixkver" ] && KTAG="v$ixkver"
+while getopts "k:o:p:d:t:" flag; do
+    case "${flag}" in
+            k) KERNEL_DIR=${OPTARG};;
+            t) KERNEL_TAG=${OPTARG};;
+            o) OLD_VER=${OPTARG};;
+            p) PATCH_DIR=${OPTARG};;
+            d) DEFCONFIG_DIR=${OPTARG};;
+        *) exit 1;;
+    esac
+done
+
+if ! [ "$KERNEL_TAG" ]; then
+    ixkver=$(getconfig BR2_LINUX_KERNEL_VERSION)
+    [ "$ixkver" ] && KERNEL_TAG="v$ixkver"
 else
-    ixkver=${KTAG#v}
+    ixkver=${KERNEL_TAG#v}
 fi
 
-if ! [ "$KTAG" ]; then
+if ! [ "$KERNEL_TAG" ]; then
     echo "Kernel tag was not supplied, and could not be inferred" >&2
     usage
     exit 1
 fi
 
-if ! [ "$PDIR" ]; then
+NEW_VER=${KERNEL_TAG#v}
+
+if ! [ "$PATCH_DIR" ]; then
     ixdir=$(getconfig BR2_EXTERNAL_INFIX_PATH)
-    [ "$ixdir" ] && PDIR="$ixdir/patches/linux/$ixkver"
+    [ "$ixdir" ] && PATCH_DIR="$ixdir/patches/linux/$NEW_VER"
 fi
 
-if ! [ "$PDIR" ]; then
+if ! [ "$PATCH_DIR" ]; then
     echo "Patch directory was not supplied, and could not be inferred" >&2
     usage
     exit 1
 fi
 
-KDIR=$(readlink -f $KDIR)
-PDIR=$(readlink -f $PDIR)
+if ! [ "$DEFCONFIG_DIR" ]; then
+    ixdir=$(getconfig BR2_EXTERNAL_INFIX_PATH)
+    DEFCONFIG_DIR=$ixdir/configs
+fi
 
-git ls-files --error-unmatch $PDIR 1>/dev/null 2>&1 && git -C $PDIR rm *.patch
-git -C $KDIR format-patch -o $PDIR $KTAG..HEAD
-git -C $PDIR add *.patch
+KERNEL_DIR=$(readlink -f $KERNEL_DIR)
+PATCH_DIR=$(readlink -f $PATCH_DIR)
+DEFCONFIG_DIR=$(readlink -f $DEFCONFIG_DIR)
+
+git ls-files --error-unmatch $PATCH_DIR 1>/dev/null 2>&1 && git -C $PATCH_DIR rm *.patch
+git -C $KERNEL_DIR format-patch -o $PATCH_DIR $KERNEL_TAG..HEAD
+git -C $PATCH_DIR add *.patch
+find "$DEFCONFIG_DIR" -name "*_defconfig" -exec sed -i "s/BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE=\"$OLD_VER\"/BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE=\"$NEW_VER\"/" {} \;