diff --git a/contest/contest/urls.py b/contest/contest/urls.py
index e6cf952..51fcbc7 100644
--- a/contest/contest/urls.py
+++ b/contest/contest/urls.py
@@ -20,10 +20,18 @@
 from django.urls import include, path
 from django_cas_ng import views as cas_views
 
+from .settings import DEBUG
+
 urlpatterns = [
     path("", include("quiz.urls")),
     path("admin/", admin.site.urls),
     path("accounts/login/", cas_views.LoginView.as_view(), name="login"),
     path("accounts/logout/", cas_views.LogoutView.as_view(), name="logout"),
-    path("__reload__/", include("django_browser_reload.urls")),
 ]
+
+if DEBUG:
+    urlpatterns.extend(
+        [
+            path("__reload__/", include("django_browser_reload.urls")),
+        ]
+    )
diff --git a/justfile b/justfile
index c6a52de..71318ac 100644
--- a/justfile
+++ b/justfile
@@ -10,6 +10,12 @@ is_dev := if env_var_or_default("DJANGO_PRODUCTION", "") == "" {
     "false"
 }
 
+poetry_install_additional_args := if env_var_or_default("CI", "") == "" {
+    ""
+} else {
+    "--sync"
+}
+
 src_dir := "contest"
 
 
@@ -46,7 +52,7 @@ check-deploy: && test (manage "check" "--deploy")
 
 # 更新依赖、数据库等（拉取他人提交后建议运行）
 update: && (manage "migrate")
-    poetry install --no-root {{ if is_dev == "false" { "--without dev" } else { "" } }}
+    poetry install --no-root {{ if is_dev == "false" { "--without dev" } else { "" } }} {{ poetry_install_additional_args }}
     {{ if is_dev == "true" { "pnpm --dir " + src_dir + "/theme/static_src/ install" } else { "" } }}
     {{ if is_dev == "true" { "pnpm --dir " + src_dir + "/js/static_src/ install" } else { "" } }}