diff --git a/tpl/think_exception.tpl b/tpl/think_exception.tpl
index 21bbafc3..d5bd5bf1 100644
--- a/tpl/think_exception.tpl
+++ b/tpl/think_exception.tpl
@@ -68,7 +68,7 @@
                         break;
                 }
 
-                $result[] = is_int($key) ? $value : "'{$key}' => {$value}";
+                $result[] = is_int($key) ? $value : sprintf('\'%s\' => %s', htmlentities($key), $value);
             }
 
             return implode(', ', $result);