diff --git a/apps/course/admin.py b/apps/course/admin.py
index 39d0f54d..70ea387e 100644
--- a/apps/course/admin.py
+++ b/apps/course/admin.py
@@ -1,7 +1,7 @@
 from django.contrib import admin
 from mptt.admin import MPTTModelAdmin, DraggableMPTTAdmin
 
-from .models import Course, Category, Lesson, Material, CourseComment, LessonComment
+from .models import Course, Category, Lesson, Material, CourseComment, LessonComment, Tag, CourseTags
 
 
 @admin.register(Course)
@@ -47,3 +47,13 @@ class CourseCommentAdmin(DraggableMPTTAdmin):
 @admin.register(LessonComment)
 class LessonCommentAdmin(DraggableMPTTAdmin):
     pass
+
+
+@admin.register(Tag)
+class TagAdmin(admin.ModelAdmin):
+    pass
+
+
+@admin.register(CourseTags)
+class CourseTagAdmin(admin.ModelAdmin):
+    pass
diff --git a/apps/course/views.py b/apps/course/views.py
index 0021f450..34f329eb 100644
--- a/apps/course/views.py
+++ b/apps/course/views.py
@@ -230,6 +230,7 @@ class CourseView(DetailView):
         except queryset.model.DoesNotExist:
             raise Http404(_("No %(verbose_name)s found matching the query") %
                           {'verbose_name': queryset.model._meta.verbose_name})
+        obj.cover = None
         return obj
 
     def get_context_data(self, **kwargs):