diff --git a/docker/nginx/default.conf b/docker/nginx/default.conf
index 4f8613c..22649c6 100644
--- a/docker/nginx/default.conf
+++ b/docker/nginx/default.conf
@@ -51,5 +51,5 @@ server {
     error_log /var/log/nginx/dmtools_error.log;
     access_log /var/log/nginx/dmtools_access.log;
 
-    client_max_body_size 20M;
+    client_max_body_size 10M;
 }
diff --git a/docker/php/php.ini b/docker/php/php.ini
index e6b86eb..3afa980 100644
--- a/docker/php/php.ini
+++ b/docker/php/php.ini
@@ -5,8 +5,8 @@ memory_limit = 256M
 max_execution_time = 60
 date.timezone = Europe/Amsterdam
 
-upload_max_filesize = 20M
-post_max_size = 21M
+upload_max_filesize = 8M
+post_max_size = 10M
 
 realpath_cache_size = 4096K
 realpath_cache_ttl = 600
diff --git a/src/Form/ArtworkType.php b/src/Form/ArtworkType.php
index ef9be94..bc3a93b 100644
--- a/src/Form/ArtworkType.php
+++ b/src/Form/ArtworkType.php
@@ -22,12 +22,14 @@ class ArtworkType extends AbstractType
             ->add('file', FileType::class, [
                 'label' => 'Image file',
                 'mapped' => false,
+                'help' => 'PNG, JPEG, GIF or WebP, up to 8 MB.',
                 'constraints' => [
                     new NotNull(message: 'Please choose an image.'),
                     new Image(
-                        maxSize: '20M',
+                        maxSize: '8M',
                         mimeTypes: ['image/png', 'image/jpeg', 'image/gif', 'image/webp'],
                         mimeTypesMessage: 'Upload a PNG, JPEG, GIF or WebP image.',
+                        maxSizeMessage: 'The image is too large ({{ size }} {{ suffix }}). Max is 8 MB.',
                     ),
                 ],
             ]);