diff --git a/backend/src/Squidex.Domain.Apps.Entities/History/NotifoService.cs b/backend/src/Squidex.Domain.Apps.Entities/History/NotifoService.cs
index 23bf294c5..55652f5b6 100644
--- a/backend/src/Squidex.Domain.Apps.Entities/History/NotifoService.cs
+++ b/backend/src/Squidex.Domain.Apps.Entities/History/NotifoService.cs
@@ -131,11 +131,11 @@ namespace Squidex.Domain.Apps.Entities.History
                 .Where(x => IsComment(x.AppEvent.Payload) || x.HistoryEvent != null)
                 .ToList();
 
-            if (publishedEvents.Any())
+            foreach (var batch in publishedEvents.Batch(50))
             {
                 var requests = new List<PublishDto>();
 
-                foreach (var @event in publishedEvents)
+                foreach (var @event in batch)
                 {
                     var payload = @event.AppEvent.Payload;
 
diff --git a/backend/src/Squidex.Infrastructure/CollectionExtensions.cs b/backend/src/Squidex.Infrastructure/CollectionExtensions.cs
index ebf208b22..5ebe19519 100644
--- a/backend/src/Squidex.Infrastructure/CollectionExtensions.cs
+++ b/backend/src/Squidex.Infrastructure/CollectionExtensions.cs
@@ -16,6 +16,38 @@ namespace Squidex.Infrastructure
 {
     public static class CollectionExtensions
     {
+        public static IEnumerable<IEnumerable<TSource>> Batch<TSource>(this IEnumerable<TSource> source, int size)
+        {
+            TSource[]? bucket = null;
+
+            var bucketIndex = 0;
+
+            foreach (var item in source)
+            {
+                if (bucket == null)
+                {
+                    bucket = new TSource[size];
+                }
+
+                bucket[bucketIndex++] = item;
+
+                if (bucketIndex != size)
+                {
+                    continue;
+                }
+
+                yield return bucket;
+
+                bucket = null;
+                bucketIndex = 0;
+            }
+
+            if (bucket != null && bucketIndex > 0)
+            {
+                yield return bucket.Take(bucketIndex);
+            }
+        }
+
         public static async Task<List<T>> ToListAsync<T>(this IAsyncEnumerable<T> source)
         {
             var result = new List<T>();