diff --git a/library/think/debug/Html.php b/library/think/debug/Html.php
index f8651aa9..b6be7adb 100644
--- a/library/think/debug/Html.php
+++ b/library/think/debug/Html.php
@@ -53,7 +53,7 @@ class Html
             return false;
         }
         // 获取基本信息
-        $runtime = number_format(microtime(true) - THINK_START_TIME, 10);
+        $runtime = number_format(microtime(true) - THINK_START_TIME, 10, '.', '');
         $reqs    = $runtime > 0 ? number_format(1 / $runtime, 2) : '∞';
         $mem     = number_format((memory_get_usage() - THINK_START_MEM) / 1024, 2);