diff --git a/apps/course/views.py b/apps/course/views.py
index cd5fd64a..b11a2928 100644
--- a/apps/course/views.py
+++ b/apps/course/views.py
@@ -146,6 +146,14 @@ class CourseView(DetailView):
         context['next'] = self.request.GET.get('next', None)
         return context
 
+    def get_queryset(self):
+        queryset = super().get_queryset().select_related(
+            'author', 'category',
+        ).prefetch_related(
+            'likes', 'materials', 'content',
+        )
+        return queryset
+
 
 class CoursesView(ListView):
     model = Course
@@ -178,7 +186,7 @@ class CoursesView(ListView):
 
     def get_queryset(self):
         queryset = super().get_queryset().select_related(
-            'author', 'category'
+            'author', 'category', 'cover',
         ).prefetch_related(
             'likes', 'materials', 'content',
         )