diff --git a/app/admin.py b/app/admin.py
index e99ed09..b517740 100644
--- a/app/admin.py
+++ b/app/admin.py
@@ -144,6 +144,7 @@ class SchoolYearFilter(admin.SimpleListFilter):
 @admin.register(School)
 class SchoolAdmin(admin.ModelAdmin):
     list_display = ('name', 'in_current', 'email', 'phone')
+    empty_value_display = '-'
 
 
 admin.site.register(Student, StudentModelAdmin)