diff --git a/lib/music_library_web/controllers/collection_json.ex b/lib/music_library_web/controllers/collection_json.ex
index 8a5f1e9f..65b46813 100644
--- a/lib/music_library_web/controllers/collection_json.ex
+++ b/lib/music_library_web/controllers/collection_json.ex
@@ -36,7 +36,9 @@ defmodule MusicLibraryWeb.CollectionJSON do
       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)}"),
       mini_cover_url:
-        url(~p"/api/v1/assets/#{Transform.new(hash: record.cover_hash, width: 150)}")
+        url(~p"/api/v1/assets/#{Transform.new(hash: record.cover_hash, width: 150)}"),
+      micro_cover_url:
+        url(~p"/api/v1/assets/#{Transform.new(hash: record.cover_hash, width: 40)}")
     }
   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 4026c0ad..b3d2e11c 100644
--- a/test/music_library_web/controllers/collection_controller_test.exs
+++ b/test/music_library_web/controllers/collection_controller_test.exs
@@ -102,7 +102,9 @@ defmodule MusicLibraryWeb.CollectionControllerTest do
       "thumb_url" =>
         "http://localhost:4002/api/v1/assets/eyJoYXNoIjoiNTk5NDA3RERGNjk5MDdENEE2MEZFMTNDQ0FBODI0RDI1Q0YwOERDMTI0RkQ2QUEzRThFN0VDRDk4Qzg4NUZGRSIsIndpZHRoIjo0ODB9",
       "mini_cover_url" =>
-        "http://localhost:4002/api/v1/assets/eyJoYXNoIjoiNTk5NDA3RERGNjk5MDdENEE2MEZFMTNDQ0FBODI0RDI1Q0YwOERDMTI0RkQ2QUEzRThFN0VDRDk4Qzg4NUZGRSIsIndpZHRoIjoxNTB9"
+        "http://localhost:4002/api/v1/assets/eyJoYXNoIjoiNTk5NDA3RERGNjk5MDdENEE2MEZFMTNDQ0FBODI0RDI1Q0YwOERDMTI0RkQ2QUEzRThFN0VDRDk4Qzg4NUZGRSIsIndpZHRoIjoxNTB9",
+      "micro_cover_url" =>
+        "http://localhost:4002/api/v1/assets/eyJoYXNoIjoiNTk5NDA3RERGNjk5MDdENEE2MEZFMTNDQ0FBODI0RDI1Q0YwOERDMTI0RkQ2QUEzRThFN0VDRDk4Qzg4NUZGRSIsIndpZHRoIjo0MH0"
     }
   end
 end