diff --git a/lib/music_library_web/controllers/collection_json.ex b/lib/music_library_web/controllers/collection_json.ex
index 0b9d9f15..8a5f1e9f 100644
--- a/lib/music_library_web/controllers/collection_json.ex
+++ b/lib/music_library_web/controllers/collection_json.ex
@@ -34,7 +34,9 @@ defmodule MusicLibraryWeb.CollectionJSON do
       artists: Enum.map(record.artists, & &1.name),
       title: record.title,
       cover_url: url(~p"/api/v1/assets/#{Transform.new(hash: record.cover_hash)}"),
-      thumb_url: url(~p"/api/v1/assets/#{Transform.new(hash: record.cover_hash, width: 480)}")
+      thumb_url: url(~p"/api/v1/assets/#{Transform.new(hash: record.cover_hash, width: 480)}"),
+      mini_cover_url:
+        url(~p"/api/v1/assets/#{Transform.new(hash: record.cover_hash, width: 150)}")
     }
   end
 end
diff --git a/test/music_library_web/controllers/collection_controller_test.exs b/test/music_library_web/controllers/collection_controller_test.exs
index c88afeee..4026c0ad 100644
--- a/test/music_library_web/controllers/collection_controller_test.exs
+++ b/test/music_library_web/controllers/collection_controller_test.exs
@@ -100,7 +100,9 @@ defmodule MusicLibraryWeb.CollectionControllerTest do
       "cover_url" =>
         "http://localhost:4002/api/v1/assets/eyJoYXNoIjoiNTk5NDA3RERGNjk5MDdENEE2MEZFMTNDQ0FBODI0RDI1Q0YwOERDMTI0RkQ2QUEzRThFN0VDRDk4Qzg4NUZGRSIsIndpZHRoIjpudWxsfQ",
       "thumb_url" =>
-        "http://localhost:4002/api/v1/assets/eyJoYXNoIjoiNTk5NDA3RERGNjk5MDdENEE2MEZFMTNDQ0FBODI0RDI1Q0YwOERDMTI0RkQ2QUEzRThFN0VDRDk4Qzg4NUZGRSIsIndpZHRoIjo0ODB9"
+        "http://localhost:4002/api/v1/assets/eyJoYXNoIjoiNTk5NDA3RERGNjk5MDdENEE2MEZFMTNDQ0FBODI0RDI1Q0YwOERDMTI0RkQ2QUEzRThFN0VDRDk4Qzg4NUZGRSIsIndpZHRoIjo0ODB9",
+      "mini_cover_url" =>
+        "http://localhost:4002/api/v1/assets/eyJoYXNoIjoiNTk5NDA3RERGNjk5MDdENEE2MEZFMTNDQ0FBODI0RDI1Q0YwOERDMTI0RkQ2QUEzRThFN0VDRDk4Qzg4NUZGRSIsIndpZHRoIjoxNTB9"
     }
   end
 end