diff --git a/simplex-chat.cabal b/simplex-chat.cabal
index fbd1d222e6..cf9b71cba1 100644
--- a/simplex-chat.cabal
+++ b/simplex-chat.cabal
@@ -148,6 +148,7 @@ library
       Simplex.Chat.Migrations.M20240528_quota_err_counter
       Simplex.Chat.Migrations.M20240827_calls_uuid
       Simplex.Chat.Migrations.M20240920_user_order
+      Simplex.Chat.Migrations.M20241008_indexes
       Simplex.Chat.Mobile
       Simplex.Chat.Mobile.File
       Simplex.Chat.Mobile.Shared
diff --git a/src/Simplex/Chat/Migrations/M20241008_indexes.hs b/src/Simplex/Chat/Migrations/M20241008_indexes.hs
new file mode 100644
index 0000000000..94cffa8d74
--- /dev/null
+++ b/src/Simplex/Chat/Migrations/M20241008_indexes.hs
@@ -0,0 +1,18 @@
+{-# LANGUAGE QuasiQuotes #-}
+
+module Simplex.Chat.Migrations.M20241008_indexes where
+
+import Database.SQLite.Simple (Query)
+import Database.SQLite.Simple.QQ (sql)
+
+m20241008_indexes :: Query
+m20241008_indexes =
+  [sql|
+CREATE INDEX idx_received_probes_group_member_id on received_probes(group_member_id);
+|]
+
+down_m20241008_indexes :: Query
+down_m20241008_indexes =
+  [sql|
+DROP INDEX idx_received_probes_group_member_id;
+|]
diff --git a/src/Simplex/Chat/Migrations/chat_schema.sql b/src/Simplex/Chat/Migrations/chat_schema.sql
index 214c0e72cc..ad13fb5db9 100644
--- a/src/Simplex/Chat/Migrations/chat_schema.sql
+++ b/src/Simplex/Chat/Migrations/chat_schema.sql
@@ -885,3 +885,6 @@ CREATE INDEX idx_chat_items_fwd_from_group_id ON chat_items(fwd_from_group_id);
 CREATE INDEX idx_chat_items_fwd_from_chat_item_id ON chat_items(
   fwd_from_chat_item_id
 );
+CREATE INDEX idx_received_probes_group_member_id on received_probes(
+  group_member_id
+);
diff --git a/src/Simplex/Chat/Store/Migrations.hs b/src/Simplex/Chat/Store/Migrations.hs
index a09baee272..a546b1851a 100644
--- a/src/Simplex/Chat/Store/Migrations.hs
+++ b/src/Simplex/Chat/Store/Migrations.hs
@@ -112,6 +112,7 @@ import Simplex.Chat.Migrations.M20240515_rcv_files_user_approved_relays
 import Simplex.Chat.Migrations.M20240528_quota_err_counter
 import Simplex.Chat.Migrations.M20240827_calls_uuid
 import Simplex.Chat.Migrations.M20240920_user_order
+import Simplex.Chat.Migrations.M20241008_indexes
 import Simplex.Messaging.Agent.Store.SQLite.Migrations (Migration (..))
 
 schemaMigrations :: [(String, Query, Maybe Query)]
@@ -223,7 +224,8 @@ schemaMigrations =
     ("20240515_rcv_files_user_approved_relays", m20240515_rcv_files_user_approved_relays, Just down_m20240515_rcv_files_user_approved_relays),
     ("20240528_quota_err_counter", m20240528_quota_err_counter, Just down_m20240528_quota_err_counter),
     ("20240827_calls_uuid", m20240827_calls_uuid, Just down_m20240827_calls_uuid),
-    ("20240920_user_order", m20240920_user_order, Just down_m20240920_user_order)
+    ("20240920_user_order", m20240920_user_order, Just down_m20240920_user_order),
+    ("20241008_indexes", m20241008_indexes, Just down_m20241008_indexes)
   ]
 
 -- | The list of migrations in ascending order by date