diff --git a/apps/course/models.py b/apps/course/models.py
index 39eed28e..dac438db 100644
--- a/apps/course/models.py
+++ b/apps/course/models.py
@@ -4,7 +4,6 @@ from uuid import uuid4
 from django.db import models
 from django.core.exceptions import ValidationError
 from django.utils import timezone
-from django.utils.text import slugify
 from django.utils.timezone import now
 from django.contrib.auth import get_user_model
 from django.urls import reverse_lazy
@@ -13,8 +12,6 @@ from polymorphic_tree.models import PolymorphicMPTTModel, PolymorphicTreeForeign
 
 from project.mixins import BaseModel, DeactivatedMixin
 
-from .manager import CategoryQuerySet
-
 from apps.content.models import ImageObject, Gallery, Video, ContestWork
 
 User = get_user_model()
diff --git a/apps/course/templates/course/course_only_lessons.html b/apps/course/templates/course/course_only_lessons.html
index 234d93ca..9efe873c 100644
--- a/apps/course/templates/course/course_only_lessons.html
+++ b/apps/course/templates/course/course_only_lessons.html
@@ -184,7 +184,7 @@
               <div class="lessons__preview">
                 <div class="lessons__pic-wrapper">
                   <img class="lessons__pic"
-                       src="{% if lesson.cover %}{{ lesson.cover.image.url }}{% else %}{% static 'img/no_cover.png' %}{% endif %}">
+                       src="{% if lesson.cover %}{{ lesson.cover.image_thumbnail.url }}{% else %}{% static 'img/no_cover.png' %}{% endif %}">
                 </div>
               </div>
               <div>
diff --git a/apps/course/templates/course/lesson.html b/apps/course/templates/course/lesson.html
index 94d6b89b..9cc570c1 100644
--- a/apps/course/templates/course/lesson.html
+++ b/apps/course/templates/course/lesson.html
@@ -31,7 +31,7 @@
         <div class="lesson__preview">
           <div class="lesson__pic-wrapper">
             <img class="lesson__pic"
-                 src="{% if lesson.cover %}{{ lesson.cover.image.url }}{% else %}{% static 'img/no_cover.png' %}{% endif %}">
+                 src="{% if lesson.cover %}{{ lesson.cover.image_thumbnail.url }}{% else %}{% static 'img/no_cover.png' %}{% endif %}">
           </div>
         </div>
         <div>
diff --git a/web/src/components/blocks/Image.vue b/web/src/components/blocks/Image.vue
index 013c63f1..527df9f1 100644
--- a/web/src/components/blocks/Image.vue
+++ b/web/src/components/blocks/Image.vue
@@ -14,7 +14,7 @@
 
     export default {
         name: "lil-image",
-        props: ["imageId", "imageUrl", "accessToken"],
+        props: ["imageId", "imageUrl", "accessToken", "longSide"],
         data() {
             return {
                 loading: false,
@@ -23,7 +23,7 @@
         methods: {
             onImageAdded(event) {
                 this.loading = true;
-                const maxSize = 1600;
+                const longSide = +this.longSide || 1600;
                 let file = event.target.files[0];
                 const reader = new FileReader();
                 reader.onload = () => {
@@ -32,12 +32,12 @@
                         let w = 0;
                         let h = 0;
                         if(img.width > img.height) {
-                            w = maxSize;
+                            w = longSide;
                             h = 0;
                         }
                         else {
                             w = 0;
-                            h = maxSize;
+                            h = longSide;
                         }
                         downscale(img.src, w, h).then((dataURL) => {
                             img = null;