diff --git a/META-INF/com/google/android/update-binary b/META-INF/com/google/android/update-binary
old mode 100644
new mode 100755
index 861d0b2..0d0a75e
--- a/META-INF/com/google/android/update-binary
+++ b/META-INF/com/google/android/update-binary
@@ -1,15 +1,36 @@
 #!/sbin/sh
+##########################################################################################
+#
+# Magisk Module Template Install Script
+# by topjohnwu
+# 
+##########################################################################################
 
 # Detect whether in boot mode
 ps | grep zygote | grep -v grep >/dev/null && BOOTMODE=true || BOOTMODE=false
+$BOOTMODE || ps -A 2>/dev/null | grep zygote | grep -v grep >/dev/null && BOOTMODE=true
+
+# This path should work in any cases
+TMPDIR=/dev/tmp
+MOUNTPATH=/magisk
+IMG=/data/magisk.img
+if $BOOTMODE; then
+  MOUNTPATH=/dev/magisk_merge
+  IMG=/data/magisk_merge.img
+fi
+INSTALLER=$TMPDIR/install
+MAGISKBIN=/data/magisk
 
 # Default permissions
 umask 022
 
 ##########################################################################################
-# Functions
+# Flashable update-binary preparation
 ##########################################################################################
 
+OUTFD=$2
+ZIP=$3
+
 ui_print() {
   if $BOOTMODE; then
     echo "$1"
@@ -19,167 +40,39 @@ ui_print() {
   fi
 }
 
-grep_prop() {
-  REGEX="s/^$1=//p"
-  shift
-  FILES=$@
-  if [ -z "$FILES" ]; then
-    FILES='/system/build.prop'
-  fi
-  cat $FILES 2>/dev/null | sed -n "$REGEX" | head -n 1
-}
-
-is_mounted() {
-  if [ ! -z "$2" ]; then
-    cat /proc/mounts | grep $1 | grep $2, >/dev/null
-  else
-    cat /proc/mounts | grep $1 >/dev/null
-  fi
-  return $?
-}
-
-mount_image() {
-  if [ ! -d "$2" ]; then
-    mount -o rw,remount rootfs /
-    mkdir -p $2 2>/dev/null
-    ($BOOTMODE) && mount -o ro,remount rootfs /
-    [ ! -d "$2" ] && return 1
-  fi
-  if (! is_mounted $2); then
-    LOOPDEVICE=
-    for LOOP in 0 1 2 3 4 5 6 7; do
-      if (! is_mounted $2); then
-        LOOPDEVICE=/dev/block/loop$LOOP
-        if [ ! -f "$LOOPDEVICE" ]; then
-          mknod $LOOPDEVICE b 7 $LOOP 2>/dev/null
-        fi
-        losetup $LOOPDEVICE $1
-        if [ "$?" -eq "0" ]; then
-          mount -t ext4 -o loop $LOOPDEVICE $2
-          if (! is_mounted $2); then
-            /system/bin/toolbox mount -t ext4 -o loop $LOOPDEVICE $2
-          fi
-          if (! is_mounted $2); then
-            /system/bin/toybox mount -t ext4 -o loop $LOOPDEVICE $2
-          fi
-        fi
-        if (is_mounted $2); then
-          ui_print "- Mounting $1 to $2"
-          break;
-        fi
-      fi
-    done
-  fi
-}
-
-set_perm() {
-  chown $2:$3 $1 || exit 1
-  chmod $4 $1 || exit 1
-  if [ ! -z "$5" ]; then
-    chcon $5 $1 2>/dev/null
-  else
-    chcon 'u:object_r:system_file:s0' $1 2>/dev/null
-  fi
+require_new_magisk() {
+  ui_print "***********************************"
+  ui_print "! $MAGISKBIN isn't setup properly!"
+  ui_print "! Please install Magisk v13.1+!"
+  ui_print "***********************************"
+  exit 1
 }
 
-set_perm_recursive() {
-  find $1 -type d 2>/dev/null | while read dir; do
-    set_perm $dir $2 $3 $4 $6
-  done
-  find $1 -type f 2>/dev/null | while read file; do
-    set_perm $file $2 $3 $5 $6
-  done
-}
+# Mount /data to access MAGISKBIN
+mount /data 2>/dev/null
 
-mktouch() {
-  mkdir -p ${1%/*}
-  if [ -z "$2" ]; then
-    touch $1
-  else
-    echo $2 > $1
-  fi
-  chmod 644 $1
-}
+# MAGISKBIN must exist, binaries and utility functions are placed there
+[ -d $MAGISKBIN -a -f $MAGISKBIN/magisk -a -f $MAGISKBIN/util_functions.sh ] || require_new_magisk
 
-request_size_check() {
-  reqSizeM=`unzip -l "$1" 2>/dev/null | tail -n 1 | awk '{ print $1 }'`
-  reqSizeM=$((reqSizeM / 1048576 + 1))
-}
+# Load utility fuctions
+. $MAGISKBIN/util_functions.sh
+[ ! -z $SCRIPT_VERSION -a $SCRIPT_VERSION -ge 1310 ] || require_new_magisk
+get_outfd
 
-image_size_check() {
-  e2fsck -yf $1
-  curBlocks=`e2fsck -n $1 2>/dev/null | grep $1 | cut -d, -f3 | cut -d\  -f2`;
-  curUsedM=`echo "$curBlocks" | cut -d/ -f1`
-  curSizeM=`echo "$curBlocks" | cut -d/ -f1`
-  curFreeM=$(((curSizeM - curUsedM) * 4 / 1024))
-  curUsedM=$((curUsedM * 4 / 1024 + 1))
-  curSizeM=$((curSizeM * 4 / 1024))
-}
+rm -rf $TMPDIR 2>/dev/null
+mkdir -p $INSTALLER
+unzip -o "$ZIP" config.sh -d $INSTALLER 2>/dev/null
 
 ##########################################################################################
-# Flashable update-binary preparation
+# Prepare
 ##########################################################################################
 
-OUTFD=$2
-ZIP=$3
-
-readlink /proc/$$/fd/$OUTFD 2>/dev/null | grep /tmp >/dev/null
-if [ "$?" -eq "0" ]; then
-  OUTFD=0
-
-  for FD in `ls /proc/$$/fd`; do
-    readlink /proc/$$/fd/$FD 2>/dev/null | grep pipe >/dev/null
-    if [ "$?" -eq "0" ]; then
-      ps | grep " 3 $FD " | grep -v grep >/dev/null
-      if [ "$?" -eq "0" ]; then
-        OUTFD=$FD
-        break
-      fi
-    fi
-  done
-fi
+[ ! -f $INSTALLER/config.sh ] && abort "! Unable to extract zip file!"
 
-if $BOOTMODE && ! is_mounted /magisk; then
-  ui_print "! Magisk is not activated!... abort"
-  exit 1
-fi
+. $INSTALLER/config.sh
 
-# Fix SuperSU.....
-$BOOTMODE && $BINDIR/sepolicy-inject --live "allow fsck * * *"
-
-# This path should work in any cases
-TMPDIR=/dev/tmp
-
-MOUNTPATH=/magisk
-IMGNAME=magisk.img
-
-if $BOOTMODE; then
-  MOUNTPATH=/dev/magisk_merge
-  IMGNAME=magisk_merge.img
-fi
-
-mkdir -p $TMPDIR 2>/dev/null
-cd $TMPDIR
-unzip -o "$ZIP" config.sh
-
-if [ ! -f "config.sh" ]; then
-  ui_print "! Failed: Unable to extract zip file!"
-  exit 1
-fi
-
-source config.sh
-
-INSTALLER=$TMPDIR/$MODID
 MODPATH=$MOUNTPATH/$MODID
 
-mkdir -p $INSTALLER
-cd $INSTALLER
-unzip -o "$ZIP" "common/*" module.prop
-
-##########################################################################################
-# Main
-##########################################################################################
-
 # Print mod name
 print_modname
 
@@ -188,73 +81,50 @@ ui_print "******************************"
 ui_print "Powered by Magisk (@topjohnwu)"
 ui_print "******************************"
 
-ui_print "- Mounting /system(ro), /vendor(ro), /data, /cache"
+ui_print "- Mounting /system, /vendor, /data, /cache"
 mount -o ro /system 2>/dev/null
 mount -o ro /vendor 2>/dev/null
 mount /data 2>/dev/null
 mount /cache 2>/dev/null
 
-if [ ! -f '/system/build.prop' ]; then
-  ui_print "! Failed: /system could not be mounted!"
-  exit 1
-fi
-
-API=`grep_prop ro.build.version.sdk`
-ABI=`grep_prop ro.product.cpu.abi | cut -c-3`
-ABI2=`grep_prop ro.product.cpu.abi2 | cut -c-3`
-ABILONG=`grep_prop ro.product.cpu.abi`
+[ ! -f /data/magisk.img ] && abort "! Magisk is not installed"
+$BOOTMODE && ! is_mounted /magisk && abort "! Magisk is not activated!"
+[ ! -f /system/build.prop ] && abort "! /system could not be mounted!"
 
-ARCH=arm
-IS64BIT=false
-if [ "$ABI" = "x86" ]; then ARCH=x86; fi;
-if [ "$ABI2" = "x86" ]; then ARCH=x86; fi;
-if [ "$ABILONG" = "arm64-v8a" ]; then ARCH=arm64; IS64BIT=true; fi;
-if [ "$ABILONG" = "x86_64" ]; then ARCH=x64; IS64BIT=true; fi;
+# Detect version and architecture
+api_level_arch_detect
 
 # You can get the Android API version from $API, the CPU architecture from $ARCH
 # Useful if you are creating Android version / platform dependent mods
 
-if is_mounted /data; then
-  IMG=/data/$IMGNAME
-  if [ ! -f "/data/magisk.img" ]; then
-    ui_print "! Magisk is not installed!"
-    ui_print "! Magisk is required for this mod!"
-    exit 1
-  fi
-else
-  IMG=/cache/magisk.img
-  ui_print " "
-  ui_print "***********************************"
-  ui_print "*      !! Data unavailible !!     *"
-  ui_print "* Magisk detection is impossible  *"
-  ui_print "* Installation will still proceed *"
-  ui_print "*  But please make sure you have  *"
-  ui_print "*        Magisk installed!!       *"
-  ui_print "***********************************"
-  ui_print " "
-fi
+##########################################################################################
+# Install
+##########################################################################################
 
-request_size_check "$ZIP"
+ui_print "- Extracting module files"
+unzip -o "$ZIP" -d $INSTALLER 2>/dev/null
+request_size_check $INSTALLER
+
+# We're going to use magisk binary now, require some recovery fixes
+$BOOTMODE || recovery_actions
 
 if [ -f "$IMG" ]; then
   ui_print "- $IMG detected!"
   image_size_check $IMG
   if [ "$reqSizeM" -gt "$curFreeM" ]; then
-    SIZE=$(((reqSizeM + curUsedM) / 32 * 32 + 64))
-    ui_print "- Resizing $IMG to ${SIZE}M..."
-    resize2fs $IMG ${SIZE}M
+    newSizeM=$(((reqSizeM + curUsedM) / 32 * 32 + 64))
+    ui_print "- Resizing $IMG to ${newSizeM}M"
+    $MAGISKBIN/magisk --resizeimg $IMG $newSizeM
   fi
 else
-  SIZE=$((reqSizeM / 32 * 32 + 64));
-  ui_print "- Creating $IMG with size ${SIZE}M"
-  make_ext4fs -l ${SIZE}M -a /magisk -S $INSTALLER/common/file_contexts_image $IMG
+  newSizeM=$((reqSizeM / 32 * 32 + 64));
+  ui_print "- Creating $IMG with size ${newSizeM}M"
+  $MAGISKBIN/magisk --createimg $IMG $newSizeM
 fi
 
-mount_image $IMG $MOUNTPATH
-if ! is_mounted $MOUNTPATH; then
-  ui_print "! $IMG mount failed... abort"
-  exit 1
-fi
+ui_print "- Mounting $IMG to $MOUNTPATH"
+MAGISKLOOP=`$MAGISKBIN/magisk --mountimg $IMG $MOUNTPATH`
+is_mounted $MOUNTPATH || abort"! $IMG mount failed..."
 
 # Create mod paths
 rm -rf $MODPATH 2>/dev/null
@@ -262,7 +132,7 @@ mkdir -p $MODPATH
 
 # Copy files
 ui_print "- Copying files"
-unzip -o "$ZIP" "system/*" -d $MODPATH
+mv $INSTALLER/system $MODPATH/system
 
 # Handle replace folders
 for TARGET in $REPLACE; do
@@ -270,14 +140,10 @@ for TARGET in $REPLACE; do
 done
 
 # Auto Mount
-if $AUTOMOUNT; then
-  mktouch $MODPATH/auto_mount
-fi
+$AUTOMOUNT && touch $MODPATH/auto_mount
 
 # prop files
-if $PROPFILE; then
-  cp -af $INSTALLER/common/system.prop $MODPATH/system.prop
-fi
+$PROPFILE && cp -af $INSTALLER/common/system.prop $MODPATH/system.prop
 
 # Module info
 cp -af $INSTALLER/module.prop $MODPATH/module.prop
@@ -288,36 +154,30 @@ if $BOOTMODE; then
 fi
 
 # post-fs-data mode scripts
-if $POSTFSDATA; then
-  cp -af $INSTALLER/common/post-fs-data.sh $MODPATH/post-fs-data.sh
-fi
+$POSTFSDATA && cp -af $INSTALLER/common/post-fs-data.sh $MODPATH/post-fs-data.sh
 
 # service mode scripts
-if $LATESTARTSERVICE; then
-  cp -af $INSTALLER/common/service.sh $MODPATH/service.sh
-fi
+$LATESTARTSERVICE && cp -af $INSTALLER/common/service.sh $MODPATH/service.sh
 
 ui_print "- Setting permissions"
 set_permissions
 
-ui_print "- Unmounting partitions"
+##########################################################################################
+# Finalizing
+##########################################################################################
 
-umount $MOUNTPATH
-losetup -d $LOOPDEVICE
+$MAGISKBIN/magisk --umountimg $MOUNTPATH $MAGISKLOOP
 rmdir $MOUNTPATH
 
 # Shrink the image if possible
 image_size_check $IMG
-NEWDATASIZE=$((curUsedM / 32 * 32 + 32))
-if [ "$curSizeM" -gt "$NEWDATASIZE" ]; then
-  ui_print "- Shrinking $IMG to ${NEWDATASIZE}M..."
-  resize2fs $IMG ${NEWDATASIZE}M
+newSizeM=$((curUsedM / 32 * 32 + 64))
+if [ $curSizeM -gt $newSizeM ]; then
+  ui_print "- Shrinking $IMG to ${newSizeM}M"
+  $MAGISKBIN/magisk --resizeimg $IMG $newSizeM
 fi
 
-if ! $BOOTMODE; then
-  umount /system
-  umount /vendor 2>/dev/null
-fi
+$BOOTMODE || recovery_cleanup
 
 ui_print "- Done"
 exit 0
diff --git a/README.md b/README.md
index 10410e5..5019590 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ which was based on changing system-wide region to China, which resulted in quite
 Magisk module modifies only a necessary part of the system without changing current region.
 
 ## Requiremenets
-- Magisk v12.0 or later
+- Magisk v13 or later
 - Version of OxygenOS should match version of the module for the best experience
 
 ## What gets modified
@@ -21,6 +21,7 @@ The one and only modification is that isSupportCallRecorder() method of OPPhoneU
 - [GitHub](https://github.com/C3C0/oos-call-recording)
 
 ## Change log
+- 2017/07/11 -> migrated to template v4 (Magisk v13)
 - 2017/06/16 -> initial release compatible with OxygenOS 4.1.6
 
 ## Like it?
diff --git a/common/file_contexts_image b/common/file_contexts_image
deleted file mode 100644
index ee54edc..0000000
--- a/common/file_contexts_image
+++ /dev/null
@@ -1 +0,0 @@
-/magisk(/.*)? u:object_r:system_file:s0
diff --git a/config.sh b/config.sh
index 901a853..55d8db5 100644
--- a/config.sh
+++ b/config.sh
@@ -1,10 +1,8 @@
 ##########################################################################################
 #
-# Magisk
+# Magisk Module Template Config Script
 # by topjohnwu
 # 
-# This is a template zip for developers
-#
 ##########################################################################################
 ##########################################################################################
 # 
diff --git a/module.prop b/module.prop
index 8437ca9..cc5aa5b 100644
--- a/module.prop
+++ b/module.prop
@@ -4,4 +4,4 @@ version=4.1.6
 versionCode=3
 author=C3C076
 description=Enables call recording in OxygenOS without changing region
-template=3
+template=4
\ No newline at end of file