diff --git a/.dockerignore b/.dockerignore
index 133b706..38a093d 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,3 +1,5 @@
 **/obj/
 **/bin/
 **/*.json
+**/*.user
+**/*.DotSettings
diff --git a/src/Numerous.Bot/Osu/MapFeedService.cs b/src/Numerous.Bot/Osu/MapFeedService.cs
index 40f261d..f39dd0a 100644
--- a/src/Numerous.Bot/Osu/MapFeedService.cs
+++ b/src/Numerous.Bot/Osu/MapFeedService.cs
@@ -69,13 +69,14 @@ private async Task CheckForNewBeatmapsetsAsync(CancellationToken ct)
             var fullSet = await api.GetBeatmapsetAsync(set.Id);
 
             var gdMapperIds = fullSet.Beatmaps
-                .Select(u => u.UserId)
-                .Where(id => id != fullSet.UserId)
-                .ToArray();
+                .SelectMany(b => b.Owners)
+                .Where(o => o.Id != fullSet.UserId)
+                .Select(o => o.Id)
+                .ToHashSet();
 
             var allMapperOsuIds = gdMapperIds
-                .Prepend(fullSet.UserId)
-                .ToArray();
+                .Append(fullSet.UserId)
+                .ToHashSet();
 
             if (allMapperOsuIds.All(id => !osuUserDiscordIdDic.ContainsKey(id)))
             {
@@ -86,7 +87,7 @@ private async Task CheckForNewBeatmapsetsAsync(CancellationToken ct)
             var allMapperDiscordIds = allMapperOsuIds
                 .Where(osuUserDiscordIdDic.ContainsKey)
                 .Select(osuId => osuUserDiscordIdDic[osuId])
-                .ToArray();
+                .ToHashSet();
 
             var mapper = osuUserDiscordIdDic.TryGetValue(fullSet.UserId, out var userId)
                 ? $"{MentionUtils.MentionUser(userId)} ({Link.OsuUser(fullSet.UserId, fullSet.Creator)})"
diff --git a/src/Numerous.Bot/Web/Osu/Models/ApiBeatmap.cs b/src/Numerous.Bot/Web/Osu/Models/ApiBeatmap.cs
index 107fb74..40b5470 100644
--- a/src/Numerous.Bot/Web/Osu/Models/ApiBeatmap.cs
+++ b/src/Numerous.Bot/Web/Osu/Models/ApiBeatmap.cs
@@ -26,6 +26,19 @@ public record ApiBeatmap
 
     [JsonProperty("difficulty_rating")]
     public required float DifficultyRating { get; init; }
+
+    [JsonProperty("owners")]
+    public required IReadOnlyCollection<Owner> Owners { get; init; }
+
+    [JsonObject(MemberSerialization.OptIn)]
+    public record Owner
+    {
+        [JsonProperty("id")]
+        public required uint Id { get; init; }
+
+        [JsonProperty("username")]
+        public required string Username { get; init; }
+    }
 }
 
 public sealed record ApiBeatmapExtended : ApiBeatmap