diff --git a/META-INF/com/google/android/update-binary b/META-INF/com/google/android/update-binary
index 08bd14f06..112eb2823 100644
--- a/META-INF/com/google/android/update-binary
+++ b/META-INF/com/google/android/update-binary
@@ -1,10 +1,151 @@
 #!/sbin/sh
-# This is a dummy file that should be replaced with a proper installer script
 
-# If you are creating a module locally for personal usage or testing,
-# download the script in the following URL:
-# https://github.com/topjohnwu/Magisk/blob/master/scripts/module_installer.sh
-# And replace this script with the downloaded script
+TMPDIR=/dev/tmp
+MOUNTPATH=/dev/magisk_img
 
-# Error, this script should always be replaced
-exit 1
+# Default permissions
+umask 022
+
+# Initial cleanup
+rm -rf $TMPDIR 2>/dev/null
+mkdir -p $TMPDIR
+
+# echo before loading util_functions
+ui_print() { echo "$1"; }
+
+require_new_magisk() {
+  ui_print "***********************************"
+  ui_print " Please install the latest Magisk! "
+  ui_print "***********************************"
+  exit 1
+}
+
+imageless_magisk() {
+  [ $MAGISK_VER_CODE -gt 18100 ]
+  return $?
+}
+
+##########################################################################################
+# Environment
+##########################################################################################
+
+OUTFD=$2
+ZIPFILE=$3
+
+mount /data 2>/dev/null
+
+# Load utility functions
+if [ -f /data/adb/magisk/util_functions.sh ]; then
+  . /data/adb/magisk/util_functions.sh
+  NVBASE=/data/adb
+else
+  require_new_magisk
+fi
+
+# Preperation for flashable zips
+setup_flashable
+
+# Mount partitions
+mount_partitions
+
+# Detect version and architecture
+api_level_arch_detect
+
+# Setup busybox and binaries
+$BOOTMODE && boot_actions || recovery_actions
+
+##########################################################################################
+# Preparation
+##########################################################################################
+
+# Extract common files
+unzip -oj "$ZIPFILE" module.prop install.sh uninstall.sh 'common/*' -d $TMPDIR >&2
+
+[ ! -f $TMPDIR/install.sh ] && abort "! Unable to extract zip file!"
+# Load install script
+. $TMPDIR/install.sh
+
+if imageless_magisk; then
+  $BOOTMODE && MODDIRNAME=modules_update || MODDIRNAME=modules
+  MODULEROOT=$NVBASE/$MODDIRNAME
+else
+  $BOOTMODE && IMGNAME=magisk_merge.img || IMGNAME=magisk.img
+  IMG=$NVBASE/$IMGNAME
+  request_zip_size_check "$ZIPFILE"
+  mount_magisk_img
+  MODULEROOT=$MOUNTPATH
+fi
+
+MODID=`grep_prop id $TMPDIR/module.prop`
+MODPATH=$MODULEROOT/$MODID
+
+print_modname
+
+ui_print "******************************"
+ui_print "Powered by Magisk (@topjohnwu)"
+ui_print "******************************"
+
+##########################################################################################
+# Install
+##########################################################################################
+
+# Create mod paths
+rm -rf $MODPATH 2>/dev/null
+mkdir -p $MODPATH
+
+on_install
+
+# Remove placeholder
+rm -f $MODPATH/system/placeholder 2>/dev/null
+
+# Custom uninstaller
+[ -f $TMPDIR/uninstall.sh ] && cp -af $TMPDIR/uninstall.sh $MODPATH/uninstall.sh
+
+# Auto Mount
+if imageless_magisk; then
+  $SKIPMOUNT && touch $MODPATH/skip_mount
+else
+  $SKIPMOUNT || touch $MODPATH/auto_mount
+fi
+
+# prop files
+$PROPFILE && cp -af $TMPDIR/system.prop $MODPATH/system.prop
+
+# Module info
+cp -af $TMPDIR/module.prop $MODPATH/module.prop
+if $BOOTMODE; then
+  # Update info for Magisk Manager
+  if imageless_magisk; then
+    mktouch $NVBASE/modules/$MODID/update
+    cp -af $TMPDIR/module.prop $NVBASE/modules/$MODID/module.prop
+  else
+    mktouch /sbin/.magisk/img/$MODID/update
+    cp -af $TMPDIR/module.prop /sbin/.magisk/img/$MODID/module.prop
+  fi
+fi
+
+# post-fs-data mode scripts
+$POSTFSDATA && cp -af $TMPDIR/post-fs-data.sh $MODPATH/post-fs-data.sh
+
+# service mode scripts
+$LATESTARTSERVICE && cp -af $TMPDIR/service.sh $MODPATH/service.sh
+
+# Handle replace folders
+for TARGET in $REPLACE; do
+  mktouch $MODPATH$TARGET/.replace
+done
+
+ui_print "- Setting permissions"
+set_permissions
+
+##########################################################################################
+# Finalizing
+##########################################################################################
+
+cd /
+imageless_magisk || unmount_magisk_img
+$BOOTMODE || recovery_cleanup
+rm -rf $TMPDIR $MOUNTPATH
+
+ui_print "- Done"
+exit 0