diff --git a/bin/replace b/bin/replace
index 8c2a906d..5c1b8de7 100755
--- a/bin/replace
+++ b/bin/replace
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 #
 # Find and replace by a given list of files.
 #
@@ -8,7 +8,6 @@ find_this="$1"; shift
 replace_with="$1"; shift
 
 items=( $(ag -l --nocolor "$find_this" "$@") )
-temp="${TMPDIR:-/tmp}/replace_tmp.$$"
 for item in ${items[@]}; do
-  sed "s/$find_this/$replace_with/g" "$item" > "$temp" && mv "$temp" "$item"
+  sed -i "s/${find_this}/${replace_with}/g" "$item"
 done