diff --git a/footnotes.php b/footnotes.php
index 0ecfbd6..330d6e1 100755
--- a/footnotes.php
+++ b/footnotes.php
@@ -1,29 +1,29 @@
 <?php
 /*
-	Plugin Name: footnotes
-	Plugin URI: http://wordpress.org/plugins/footnotes/
-	Description: time to bring footnotes to your website! footnotes are known from offline publishing and everybody takes them for granted when reading a magazine.
-	Author: ManFisher Medien ManuFaktur
-	Version: 1.6.4
-	Author URI: http://manfisher.net/plugins/footnotes/
-	Text Domain: footnotes
-	Domain Path: /languages
+    Plugin Name: footnotes
+    Plugin URI: http://wordpress.org/plugins/footnotes/
+    Description: time to bring footnotes to your website! footnotes are known from offline publishing and everybody takes them for granted when reading a magazine.
+    Author: ManFisher Medien ManuFaktur
+    Version: 1.6.5
+    Author URI: http://manfisher.net/plugins/footnotes/
+    Text Domain: footnotes
+    Domain Path: /languages
 */
 /*
-	Copyright 2014  Mark Cheret, Stefan Herndler (email : info@manfisher.eu | support@herndler.org)
+    Copyright 2014  Mark Cheret, Stefan Herndler, Erica Franz (email : info@manfisher.eu | support@herndler.org | erica@fatpony.me)
 
-	This program is free software; you can redistribute it and/or modify
-	it under the terms of the GNU General Public License, version 3, as
-	published by the Free Software Foundation.
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License, version 3, as
+    published by the Free Software Foundation.
 
-	This program is distributed in the hope that it will be useful,
-	but WITHOUT ANY WARRANTY; without even the implied warranty of
-	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-	GNU General Public License for more details.
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
 
-	You should have received a copy of the GNU General Public License
-	along with this program; if not, write to the Free Software
-	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
 /**
  * @filesource
diff --git a/readme.txt b/readme.txt
index fd7c154..e996af5 100755
--- a/readme.txt
+++ b/readme.txt
@@ -1,9 +1,9 @@
 === footnotes ===
-Contributors: Aricura, mark.cheret
+Contributors: Aricura, mark.cheret, ericakfranz
 Tags: footnote, bibliography, formatting, notes, post, reference
 Requires at least: 3.9
-Tested up to: 4.5.3
-Stable Tag: 2.0
+Tested up to: 4.8.1
+Stable Tag: 1.6.5
 License: GPLv2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 
@@ -79,7 +79,8 @@ Visit this swift write-up from a **footnotes** user by the name of **Southwest**
 
 == Changelog ==
 
-=
+= 1.6.5 =
+* Bugfix: Check if quicktags script is available before loading custom QTag button. This fixes a JS error which may have interfered with other functionality on custom post type edit screens.
 
 = 1.6.4 =
 
diff --git a/templates/dashboard/editor-button.html b/templates/dashboard/editor-button.html
deleted file mode 100644
index b1c8695..0000000
--- a/templates/dashboard/editor-button.html
+++ /dev/null
@@ -1,41 +0,0 @@
-<script type="text/javascript">
-	/**
-	 * adds a tag in at the beginning and at the end of a selected text in the specific text area
-	 * @param string elementID
-	 * @param string openTag
-	 * @param string closeTag
-	 */
-	function MCI_Footnotes_wrapText(elementID, openTag, closeTag) {
-		var textArea = jQuery('#' + elementID);
-		var len = textArea.val().length;
-		var start = textArea[0].selectionStart;
-		var end = textArea[0].selectionEnd;
-		var selectedText = textArea.val().substring(start, end);
-		var replacement = openTag + selectedText + closeTag;
-		textArea.val(textArea.val().substring(0, start) + replacement + textArea.val().substring(end, len));
-	}
-	/**
-	 * adds a new button to the plain text editor
-	 */
-	QTags.addButton( 'MCI_Footnotes_QuickTag_button', 'footnotes', MCI_Footnotes_text_editor_callback );
-	/**
-	 * callback function when the button is clicked
-	 * executes a ajax call to get the start and end tag for the footnotes and
-	 * adds them in before and after the selected text
-	 */
-	function MCI_Footnotes_text_editor_callback() {
-		jQuery.ajax({
-			type: 'POST',
-			url: '/wp-admin/admin-ajax.php',
-			data: {
-				action: 'footnotes_getTags'
-			},
-			success: function(data, textStatus, XMLHttpRequest){
-				var l_arr_Tags = JSON.parse(data);
-				MCI_Footnotes_wrapText("content", l_arr_Tags['start'], l_arr_Tags['end']);
-			},
-			error: function(MLHttpRequest, textStatus, errorThrown){
-			}
-		});
-	}
-</script>
\ No newline at end of file
diff --git a/templates/dashboard/editor-button.php b/templates/dashboard/editor-button.php
new file mode 100644
index 0000000..9564d08
--- /dev/null
+++ b/templates/dashboard/editor-button.php
@@ -0,0 +1,63 @@
+<?php ?>
+    <script type="text/javascript">
+        /**
+         * adds a tag in at the beginning and at the end of a selected text in the specific text area
+         * @param string elementID
+         * @param string openTag
+         * @param string closeTag
+         */
+        function MCI_Footnotes_wrapText(elementID, openTag, closeTag) {
+            var textArea = jQuery('#' + elementID);
+            var len = textArea.val().length;
+            var start = textArea[0].selectionStart;
+            var end = textArea[0].selectionEnd;
+            var selectedText = textArea.val().substring(start, end);
+            var replacement = openTag + selectedText + closeTag;
+            textArea.val(textArea.val().substring(0, start) + replacement + textArea.val().substring(end, len));
+        }
+
+        <?php
+        /**
+         * adds a new button to the plain text editor
+        */
+        function load_footnotes_quicktag_inline() {
+
+            /**
+             * Adds a check to ensure the quicktags script is available
+             * preventing undefined error if no quicktags script
+             * @author Erica Franz
+            */
+            if ( wp_script_is( 'quicktags' ) ) { ?>
+
+                // And now the footnotes button
+                QTags.addButton('MCI_Footnotes_QuickTag_button', 'footnotes', MCI_Footnotes_text_editor_callback);
+
+                <?php }
+
+        }
+
+        add_action( 'admin_print_footer_scripts', 'load_footnotes_quicktag_inline' );
+
+        ?>
+
+        /**
+         * callback function when the button is clicked
+         * executes a ajax call to get the start and end tag for the footnotes and
+         * adds them in before and after the selected text
+         */
+        function MCI_Footnotes_text_editor_callback() {
+            jQuery.ajax({
+                type: 'POST',
+                url: '/wp-admin/admin-ajax.php',
+                data: {
+                    action: 'footnotes_getTags'
+                },
+                success: function (data, textStatus, XMLHttpRequest) {
+                    var l_arr_Tags = JSON.parse(data);
+                    MCI_Footnotes_wrapText("content", l_arr_Tags['start'], l_arr_Tags['end']);
+                },
+                error: function (MLHttpRequest, textStatus, errorThrown) {}
+            });
+        }
+    </script>
+    <?php ?>