diff --git a/_posts/help/1970-01-01-debian.md b/_posts/help/1970-01-01-debian.md
index 49f4782..211180e 100644
--- a/_posts/help/1970-01-01-debian.md
+++ b/_posts/help/1970-01-01-debian.md
@@ -24,11 +24,12 @@ $ sudo apt install apt-transport-https
 <div class="form-group">
 	<label>选择你的 Debian 版本: </label>
 	<select class="form-control release-select" data-template="#apt-template" data-target="#apt-content">
-	  <option data-release="sid">sid</option>
-	  <option data-release="testing">testing</option>
-	  <option data-release="buster">buster</option>
-	  <option data-release="stretch" selected>stretch</option>
-	  <option data-release="jessie">jessie</option>
+	  <option data-release="sid" data-security="-security">sid</option>
+	  <option data-release="testing" data-security="-security">testing</option>
+	  <option data-release="bullseye" data-security="-security">bullseye</option>
+	  <option data-release="buster" data-security="/updates" selected>buster</option>
+	  <option data-release="stretch" data-security="/updates">stretch</option>
+	  <option data-release="jessie" data-security="/updates">jessie</option>
 	</select>
 </div>
 </form>
@@ -42,8 +43,8 @@ deb https://mirrors.tuna.tsinghua.edu.cn/debian/ {{release_name}}-updates main c
 # deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ {{release_name}}-updates main contrib non-free
 deb https://mirrors.tuna.tsinghua.edu.cn/debian/ {{release_name}}-backports main contrib non-free
 # deb-src https://mirrors.tuna.tsinghua.edu.cn/debian/ {{release_name}}-backports main contrib non-free
-deb https://mirrors.tuna.tsinghua.edu.cn/debian-security {{release_name}}/updates main contrib non-free
-# deb-src https://mirrors.tuna.tsinghua.edu.cn/debian-security {{release_name}}/updates main contrib non-free
+deb https://mirrors.tuna.tsinghua.edu.cn/debian-security {{release_name}}{{release_security}} main contrib non-free
+# deb-src https://mirrors.tuna.tsinghua.edu.cn/debian-security {{release_name}}{{release_security}} main contrib non-free
 
 </script>
 {% endraw %}
diff --git a/static/js/help.es6 b/static/js/help.es6
index 0520d23..e1c3021 100644
--- a/static/js/help.es6
+++ b/static/js/help.es6
@@ -9,6 +9,7 @@ $(document).ready(() => {
 		var sel = $(ev.target),
 			os_name=sel.find("option:selected").data('os'),
 			release_name=sel.find("option:selected").data('release'),
+			release_security=sel.find("option:selected").data('security'),
 			opt=sel.find('option:selected').data('opt'),
 			tmpl_selector=sel.data("template"), 
 			target_selector=sel.data("target"),
@@ -16,6 +17,7 @@ $(document).ready(() => {
 			tmpl_data=$.extend({}, {
 				os_name: os_name,
 				release_name: release_name
+				release_security: release_security,
 			}, opt),
 			apt_content=Mark.up(
 				apt_template,