diff --git a/modules/Reputation/Reputation.cs b/modules/Reputation/Reputation.cs
index 5ef8769..c2ad89b 100644
--- a/modules/Reputation/Reputation.cs
+++ b/modules/Reputation/Reputation.cs
@@ -1,5 +1,5 @@
 using Kruzya.TelegramBot.Core;
-using Kruzya.TelegramBot.Core.Options;
+using Kruzya.TelegramBot.Core.Extensions;
 using Kruzya.TelegramBot.Core.Service;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Configuration;
@@ -21,7 +21,7 @@ public class Reputation : Module
         var dsn = Configuration.GetConnectionString("Reputation");
         services.AddDbContext<ReputationContext>(options => options.UseMySql(dsn, ServerVersion.AutoDetect(dsn)));
 
+        services.AddOption<KarmaMode>();
         services.AddScoped<IReputation, ReputationService>();
-        services.AddScoped<IOption, KarmaMode>();
     }
 }
\ No newline at end of file
diff --git a/modules/Reputation/Service/ReputationService.cs b/modules/Reputation/Service/ReputationService.cs
index 2a3c667..1169cf0 100644
--- a/modules/Reputation/Service/ReputationService.cs
+++ b/modules/Reputation/Service/ReputationService.cs
@@ -4,16 +4,19 @@ using Kruzya.TelegramBot.Core.Service;
 using Microsoft.EntityFrameworkCore;
 using Telegram.Bot.Types;
 using West.TelegramBot.Reputation.Data;
+using West.TelegramBot.Reputation.Options;
 
 namespace West.TelegramBot.Reputation.Service;
 
 public class ReputationService : IReputation
 {
     private readonly ReputationContext _reputationContext;
+    private readonly KarmaMode _karmaMode;
 
-    public ReputationService(ReputationContext reputationContext)
+    public ReputationService(ReputationContext reputationContext, KarmaMode karmaMode)
     {
         _reputationContext = reputationContext;
+        _karmaMode = karmaMode;
     }
 
     public async Task<double> GetUserReputationAsync(Chat chat, User user)
@@ -45,14 +48,25 @@ public class ReputationService : IReputation
     public async Task<double> GetReputationDiffAsync(Chat chat, User sender, User receiver)
     {
         var senderRep = await FindUserReputation(chat, sender);
-        
         if (senderRep == null)
         {
             return 1;
         }
-
+        
+        var karmaMode = await _karmaMode.GetValueAsync(chat.Id);
         var senderValue = senderRep.Value;
-        return Math.Round(senderValue == 0 ? 1 : Math.Sqrt(senderValue), 2);
+
+        double diff;
+        if (senderValue == 0 || karmaMode == "linear")
+        {
+            diff = 1;
+        }
+        else
+        {
+            diff = Math.Round(Math.Sqrt(senderValue), 2);
+        }
+        
+        return diff;
     }
 
     public async Task<IEnumerable<IReputationEntity>> GetChatRatingAsync(Chat chat, int limit = 10, int offset = 0)