diff --git a/Gmeek.py b/Gmeek.py
index 3a8dc43..9ca70b4 100644
--- a/Gmeek.py
+++ b/Gmeek.py
@@ -73,7 +73,7 @@ class GMEEK():
         os.mkdir(self.post_dir)
 
     def defaultConfig(self):
-        dconfig={"singlePage":[],"startSite":"","filingNum":"","onePageListNum":15,"commentLabelColor":"#006b75","yearColorList":["#bc4c00", "#0969da", "#1f883d", "#A333D0"],"i18n":"CN","themeMode":"manual","dayTheme":"light","nightTheme":"dark","urlMode":"pinyin","script":"","style":"","indexScript":"","indexStyle":"","bottomText":"","showPostSource":1,"iconList":{},"UTC":+8,"rssSplit":"sentence","exlink":{}}
+        dconfig={"singlePage":[],"startSite":"","filingNum":"","onePageListNum":15,"commentLabelColor":"#006b75","yearColorList":["#bc4c00", "#0969da", "#1f883d", "#A333D0"],"i18n":"CN","themeMode":"manual","dayTheme":"light","nightTheme":"dark","urlMode":"pinyin","script":"","style":"","indexScript":"","indexStyle":"","bottomText":"","showPostSource":1,"iconList":{},"UTC":+8,"rssSplit":"sentence","exlink":{},"primerCSS":""}
         config=json.loads(open('config.json', 'r', encoding='utf-8').read())
         self.blogBase={**dconfig,**config}.copy()
         self.blogBase["postListJson"]=json.loads('{}')
@@ -88,6 +88,9 @@ class GMEEK():
         if "ogImage" not in self.blogBase:
             self.blogBase["ogImage"]=self.blogBase["avatarUrl"]
 
+        if "primerCSS" not in self.blogBase:
+            self.blogBase["primerCSS"]="<link href='https://mirrors.sustech.edu.cn/cdnjs/ajax/libs/Primer/21.0.7/primer.css' rel='stylesheet' />"
+
         if "homeUrl" not in self.blogBase:
             if str(self.repo.name).lower() == (str(self.repo.owner.login) + ".github.io").lower():
                 self.blogBase["homeUrl"] = f"https://{self.repo.name}"
diff --git a/templates/base.html b/templates/base.html
index c08a19b..5066103 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -4,7 +4,7 @@
     <meta content="text/html; charset=utf-8" http-equiv="content-type" />
     <meta name="viewport" content="width=device-width,initial-scale=1.0">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
-    <link href="//cdn.staticfile.net/Primer/21.0.7/primer.css" rel="stylesheet" />
+    {{ blogBase['primerCSS'] }}
     <link rel="icon" href="{{ blogBase['faviconUrl'] }}">
     {%- if blogBase['themeMode']=='manual' -%}
     <script>