diff --git a/lib/src/class/supabase_chat_controller.dart b/lib/src/class/supabase_chat_controller.dart
index f182b3d..9c21029 100644
--- a/lib/src/class/supabase_chat_controller.dart
+++ b/lib/src/class/supabase_chat_controller.dart
@@ -73,7 +73,7 @@ class SupabaseChatController {
       .select()
       .eq('roomId', int.parse(_room.id))
       .order('createdAt', ascending: false)
-      .range(pageSize * _currentPage, (_currentPage * pageSize) + pageSize);
+      .range(pageSize * _currentPage, (_currentPage * pageSize) + pageSize - 1);
 
   void _onData(
     List<Map<String, dynamic>> newData,
diff --git a/lib/src/class/supabase_chat_core.dart b/lib/src/class/supabase_chat_core.dart
index eea714c..a214a45 100644
--- a/lib/src/class/supabase_chat_core.dart
+++ b/lib/src/class/supabase_chat_core.dart
@@ -356,7 +356,7 @@ class SupabaseChatCore {
         : table.select();
     var query = queryUnlimited.order('updatedAt', ascending: false);
     if (offset != null && limit != null) {
-      query = query.range(offset, offset + limit);
+      query = query.range(offset, offset + limit - 1);
     } else if (limit != null) {
       query = query.limit(limit);
     }
@@ -574,7 +574,7 @@ class SupabaseChatCore {
         .order('firstName', ascending: true)
         .order('lastName', ascending: true);
     if (offset != null && limit != null) {
-      query = query.range(offset, offset + limit);
+      query = query.range(offset, offset + limit - 1);
     } else if (limit != null) {
       query = query.limit(limit);
     }