diff --git a/lib/core/config/blossom_config.dart b/lib/core/config/blossom_config.dart
index 70e11ad9..dda41d70 100644
--- a/lib/core/config/blossom_config.dart
+++ b/lib/core/config/blossom_config.dart
@@ -1,19 +1,23 @@
 /// Configuration for Blossom server settings and upload parameters
 class BlossomConfig {
   /// Default Blossom servers used for media uploads
-  /// 
+  ///
   /// These servers are tried in order when uploading files.
   /// If one fails, the next server in the list is attempted.
+  ///
+  /// Chat attachments are encrypted before upload, so they are sent as
+  /// `application/octet-stream`. Only add servers that accept opaque blobs:
+  /// media-only servers reject them by sniffing the content, which fails
+  /// every attachment regardless of the original file type.
+  ///
+  /// Servers must also retain blobs indefinitely. Ephemeral hosts expire
+  /// files after weeks, which would silently break dispute evidence.
   static const List<String> defaultServers = [
-    'https://blossom.primal.net',
-    'https://blossom.band',
-    'https://nostr.media',
-    'https://blossom.sector01.com',
-    'https://24242.io',
-    'https://otherstuff.shaving.kiwi',
-    'https://blossom.f7z.io',
-    'https://nosto.re',
-    'https://blossom.poster.place',
+    'https://cdn.hzrd149.com',
+    'https://nostr.download',
+    'https://blossom-01.uid.ovh',
+    'https://files.sovbit.host',
+    'https://blssm.us',
   ];
   
   /// Default upload timeout duration