diff --git a/debug-bar-timber.php b/debug-bar-timber.php
index c10827b..f7c6176 100644
--- a/debug-bar-timber.php
+++ b/debug-bar-timber.php
@@ -1,34 +1,40 @@
-<?php
-/*
-	Plugin Name: Timber Debug Bar
-	Plugin URI: https://github.com/upstatement/debug-bar-timber/
-	Description: Adds Timber render to the debug bar. Requires the debug bar plugin.
-	Author: Jared Nova + Upstatement
-	Version: 1.0.8
-	Author URI: https://upstatement.com/
-*/
-
-add_filter('debug_bar_panels', static function($panels) {
-    require_once('class-debug-bar-timber.php');
-    $panels[] = new Debug_Bar_Timber();
-    return $panels;
-});
-
-add_action('init', static function() {
-	if ( !class_exists('Debug_Bar') ) {
-		$class = 'error';
-
-		$url = admin_url('plugin-install.php?tab=plugin-information&amp;plugin=debug-bar&amp;TB_iframe=true&amp;width=772&amp;height=300');
-
-		$text = "In order to use the Timber Debug Bar, you need to install and activate the <a href='$url' class='thickbox'>WordPress Debug Bar</a> Plugin";
-
-		add_action( 'admin_notices', static function() use ( $text, $class ) {
-			echo '<div class="'.$class.'"><p>'.$text.'</p></div>';
-		}, 1 );
-	}
-}, 11);
-
-function tdb_enqueue_styles() {
-	wp_enqueue_style( 'dbt', plugins_url( "timber-debug-bar.css", __FILE__ ), [], '20200710' );
-}
-add_action( 'wp_enqueue_scripts', 'tdb_enqueue_styles', 99 );
+<?php
+/*
+	Plugin Name: Timber Debug Bar
+	Plugin URI: https://github.com/upstatement/debug-bar-timber/
+	Description: Adds Timber render to the debug bar. Requires the debug bar plugin.
+	Author: Jared Nova + Upstatement
+	Version: 1.0.5
+	Author URI: https://upstatement.com/
+*/
+
+// bail early if Timber class does not exist
+// useful when you switch themes to non timber based themes (ie. twentytwentyone) for debugging etc.
+if ( !class_exists('Timber') ) {
+        return;
+}
+
+add_filter('debug_bar_panels', static function($panels) {
+    require_once('class-debug-bar-timber.php');
+    $panels[] = new Debug_Bar_Timber();
+    return $panels;
+});
+
+add_action('init', static function() {
+	if ( !class_exists('Debug_Bar') ) {
+		$class = 'error';
+
+		$url = admin_url('plugin-install.php?tab=plugin-information&amp;plugin=debug-bar&amp;TB_iframe=true&amp;width=772&amp;height=300');
+
+		$text = "In order to use the Timber Debug Bar, you need to install and activate the <a href='$url' class='thickbox'>WordPress Debug Bar</a> Plugin";
+
+		add_action( 'admin_notices', static function() use ( $text, $class ) {
+			echo '<div class="'.$class.'"><p>'.$text.'</p></div>';
+		}, 1 );
+	}
+});
+
+function tdb_enqueue_styles() {
+	wp_enqueue_style( 'dbt', plugins_url( "timber-debug-bar.css", __FILE__ ), [], '20200710' );
+}
+add_action( 'wp_enqueue_scripts', 'tdb_enqueue_styles', 99 );