diff --git a/versions/max_file_size.go b/versions/max_file_size.go
index 740904d..63ee8e4 100644
--- a/versions/max_file_size.go
+++ b/versions/max_file_size.go
@@ -11,106 +11,25 @@ func getScript() string {
 }
 
 const script = `
-#!/bin/bash -u
-# https://github.com/mgit-at/git-max-filesize/blob/master/pre-receive.sh
-# git-max-filesize
-#
-# git pre-receive hook to reject large files that should be commited
-# via git-lfs (large file support) instead.
-#
-# Author: Christoph Hack <chack@mgit.at>
-# Copyright (c) 2017 mgIT GmbH. All rights reserved.
-# Distributed under the Apache License. See LICENSE for details.
-#
-set -o pipefail
-
-# "5242880" # 5MB
-readonly DEFAULT_MAXSIZE={{{MAXSIZE}}}
-readonly CONFIG_NAME="hooks.maxfilesize"
-readonly NULLSHA="0000000000000000000000000000000000000000"
-readonly EXIT_SUCCESS="0"
-readonly EXIT_FAILURE="1"
-
-# main entry point
+#!/bin/bash
 function main() {
-  local status="$EXIT_SUCCESS"
-
-  # get maximum filesize (from repository-specific config)
-  local maxsize
-  maxsize="$(get_maxsize)"
-  if [[ "$?" != 0 ]]; then
-    echo "failed to get ${CONFIG_NAME} from config"
-    exit "$EXIT_FAILURE"
-  fi
-
-  # skip this hook entirely if maxsize is 0.
+  local maxsize={{{MAXSIZE}}}
   if [[ "$maxsize" == 0 ]]; then
-    cat > /dev/null
-    exit "$EXIT_SUCCESS"
+    return
   fi
-
-  # read lines from stdin (format: "<oldref> <newref> <refname>\n")
-  local oldref
-  local newref
-  local refname
-  while read oldref newref refname; do
-    # skip branch deletions
-    if [[ "$newref" == "$NULLSHA" ]]; then
-      continue
+  (
+    git diff --name-only --cached
+    git diff --name-only
+    git ls-files --others --exclude-standard
+  ) 2>&1 \
+  | sort -u \
+  | while read -r file; do
+    local size="$(du -sk "$file" | awk '{print $1}')000"
+    if [ "$size" -gt "$maxsize" ]; then
+       echo "file=$file, size=$size, max=$maxsize" >&2
+       git reset HEAD -- "$file"
     fi
-
-    # find large objects
-    # check all objects from $oldref (possible $NULLSHA) to $newref, but
-    # skip all objects that have already been accepted (i.e. are referenced by
-    # another branch or tag).
-    local target
-    if [[ "$oldref" == "$NULLSHA" ]]; then
-      target="$newref"
-    else
-      target="${oldref}..${newref}"
-    fi
-    local large_files
-    large_files="$(git rev-list --objects "$target" --not --branches=\* --tags=\* | \
-      git cat-file $'--batch-check=%(objectname)\t%(objecttype)\t%(objectsize)\t%(rest)' | \
-      awk -F '\t' -v maxbytes="$maxsize" '$3 > maxbytes' | cut -f 4-)"
-    if [[ "$?" != 0 ]]; then
-      echo "failed to check for large files in ref ${refname}"
-      continue
-    fi
-
-    IFS=$'\n'
-    for file in $large_files; do
-      if [[ "$status" == 0 ]]; then
-        echo ""
-        echo "-------------------------------------------------------------------------"
-        echo "Your push was rejected because it contains files larger than $(numfmt --to=iec "$maxsize")."
-        echo "Please use https://git-lfs.github.com/ to store larger files."
-        echo "-------------------------------------------------------------------------"
-        echo ""
-        echo "Offending files:"
-        status="$EXIT_FAILURE"
-      fi
-      echo " - ${file} (ref: ${refname})"
-    done
-    unset IFS
   done
-
-  exit "$status"
 }
-
-# get the maximum filesize configured for this repository or the default
-# value if no specific option has been set. Suffixes like 5k, 5m, 5g, etc.
-# can be used (see git config --int).
-function get_maxsize() {
-  local value;
-  value="$(git config --int "$CONFIG_NAME")"
-  if [[ "$?" != 0 ]] || [[ -z "$value" ]]; then
-    echo "$DEFAULT_MAXSIZE"
-    return "$EXIT_SUCCESS"
-  fi
-  echo "$value"
-  return "$EXIT_SUCCESS"
-}
-
 main
 `