diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2c134c13..4395a309 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,8 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
-## [4.5.5] - 2024-11-21
+- Fixed escaping of array/object keys in debug_print_var
 
+## [4.5.5] - 2024-11-21
 
 - Support the deprecations introduced in PHP 8.4 and added tests for PHP 8.4 [#1084](https://github.com/smarty-php/smarty/pull/1084)
 
diff --git a/libs/plugins/modifier.debug_print_var.php b/libs/plugins/modifier.debug_print_var.php
index 78397d01..1a3ff0de 100644
--- a/libs/plugins/modifier.debug_print_var.php
+++ b/libs/plugins/modifier.debug_print_var.php
@@ -31,7 +31,7 @@ function smarty_modifier_debug_print_var($var, $max = 10, $length = 40, $depth =
                 break;
             }
             foreach ($var as $curr_key => $curr_val) {
-                $results .= '<br>' . str_repeat('&nbsp;', $depth * 2) . '<b>' . strtr($curr_key, $_replace) .
+                $results .= '<br>' . str_repeat('&nbsp;', $depth * 2) . '<b>' . htmlspecialchars(strtr($curr_key, $_replace)) .
                             '</b> =&gt; ' .
                             smarty_modifier_debug_print_var($curr_val, $max, $length, ++$depth, $objects);
                 $depth--;
@@ -49,7 +49,7 @@ function smarty_modifier_debug_print_var($var, $max = 10, $length = 40, $depth =
             }
             $objects[] = $var;
             foreach ($object_vars as $curr_key => $curr_val) {
-                $results .= '<br>' . str_repeat('&nbsp;', $depth * 2) . '<b> -&gt;' . strtr($curr_key, $_replace) .
+                $results .= '<br>' . str_repeat('&nbsp;', $depth * 2) . '<b> -&gt;' . htmlspecialchars(strtr($curr_key, $_replace)) .
                             '</b> = ' . smarty_modifier_debug_print_var($curr_val, $max, $length, ++$depth, $objects);
                 $depth--;
             }