diff --git a/articles b/articles
index 2a37d97..705c2d2 160000
--- a/articles
+++ b/articles
@@ -1 +1 @@
-Subproject commit 2a37d97cc09d587db5f97251ef98dbcf36682c48
+Subproject commit 705c2d2eb1d00254d193acb3faf2e27c5421bf01
diff --git a/config.json b/config.json
index 124e1af..9c8155a 100644
--- a/config.json
+++ b/config.json
@@ -4,7 +4,6 @@
     "templateDir": "template",
     "cssFile": [
         "https://its-just-nans.github.io/cdn/custom.showdown.css",
-        "https://unpkg.com/katex@0.10.0/dist/katex.min.css",
         "https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.4.0/styles/default.min.css"
     ]
-}
\ No newline at end of file
+}
diff --git a/template/head.html b/template/head.html
index e6ec050..b8096c7 100644
--- a/template/head.html
+++ b/template/head.html
@@ -1,4 +1,6 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-<meta name="description" content="Just a simple website" />
+<meta charset="utf-8" />
+<meta name="description" content="Just a simple knowledge base" />
 <link rel="icon" href="https://its-just-nans.github.io/favicon.ico" />
-<link rel="stylesheet" href="./style.css" />
\ No newline at end of file
+<link rel="stylesheet" href="./style.css" />
+<link rel="stylesheet" href="https://unpkg.com/katex@0.10.0/dist/katex.min.css" />