diff --git a/sbas/admin.py b/sbas/admin.py
index 63e80f95..807c51be 100644
--- a/sbas/admin.py
+++ b/sbas/admin.py
@@ -1,3 +1,4 @@
+from physics.models import Category
 from django.contrib import admin
 
 # Register your models here.
@@ -28,6 +29,7 @@ class QuestionAdmin(VersionAdmin):
 class ExamAdmin(VersionAdmin, admin.ModelAdmin):
     save_as = True
 
+admin.site.register(Category)
 admin.site.register(Question, QuestionAdmin)
 admin.site.register(Exam, ExamAdmin)
 class CidUserAnswerAdmin(admin.ModelAdmin):