diff --git a/conf/serializers.py b/conf/serializers.py
index e50dfa2..a428479 100644
--- a/conf/serializers.py
+++ b/conf/serializers.py
@@ -26,6 +26,7 @@ class CreateEditWebsiteConfigSerializer(serializers.Serializer):
     website_footer = serializers.CharField(max_length=1024 * 1024)
     allow_register = serializers.BooleanField()
     submission_list_show_all = serializers.BooleanField()
+    class_list = serializers.ListField(child=serializers.CharField(max_length=64))
 
 
 class JudgeServerSerializer(serializers.ModelSerializer):
diff --git a/options/options.py b/options/options.py
index f1843fd..f37757a 100644
--- a/options/options.py
+++ b/options/options.py
@@ -99,6 +99,7 @@ class OptionKeys:
     website_footer = "website_footer"
     allow_register = "allow_register"
     submission_list_show_all = "submission_list_show_all"
+    class_list = "class_list"
     smtp_config = "smtp_config"
     judge_server_token = "judge_server_token"
     throttling = "throttling"
@@ -112,6 +113,7 @@ class OptionDefaultValue:
     website_footer = "Online Judge Footer"
     allow_register = True
     submission_list_show_all = True
+    class_list = []
     smtp_config = {}
     judge_server_token = default_token
     throttling = {"ip": {"capacity": 100, "fill_rate": 0.1, "default_capacity": 50},
@@ -229,6 +231,14 @@ class _SysOptionsMeta(type):
     def submission_list_show_all(cls, value):
         cls._set_option(OptionKeys.submission_list_show_all, value)
 
+    @my_property(ttl=DEFAULT_SHORT_TTL)
+    def class_list(cls):
+        return cls._get_option(OptionKeys.class_list)
+
+    @class_list.setter
+    def class_list(cls, value):
+        cls._set_option(OptionKeys.class_list, value)
+
     @my_property
     def smtp_config(cls):
         return cls._get_option(OptionKeys.smtp_config)