diff --git a/article.html b/article.html
index f284276..7bf3e61 100644
--- a/article.html
+++ b/article.html
@@ -15,7 +15,7 @@
         <title>Articles Kinthai</title>
         <meta name="description" content="Kinthai's articles">
         <meta name="robots" content="index, follow">
-        <link rel="canonical" href="https://kinthai.in.th/article.php">
+        <link rel="canonical" href="https://kinthai.in.th/article.html">
         <meta charset="UTF-8" />
         <meta name="viewport" content="width=device-width, initial-scale=1.0" />