diff --git a/BeReadyBackend.sln.DotSettings.user b/BeReadyBackend.sln.DotSettings.user
index 95ef1f5..da97fdf 100644
--- a/BeReadyBackend.sln.DotSettings.user
+++ b/BeReadyBackend.sln.DotSettings.user
@@ -1,2 +1,3 @@
 <wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AIHubContext_00601_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003FAppData_003FRoaming_003FJetBrains_003FRider2025_002E3_003Fresharper_002Dhost_003FDecompilerCache_003Fdecompiler_003F731dbe51d65849048244493644b992cd78910_003Fda_003Fd14ae6ee_003FIHubContext_00601_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
 	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003ARepositoryBaseOfT_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003FAppData_003FRoaming_003FJetBrains_003FRider2025_002E2_003Fresharper_002Dhost_003FSourcesCache_003F5023b5be698d783ffe9f42b2e944a85a7a66b61bc5e19c76c591036343fd16_003FRepositoryBaseOfT_002Ecs/@EntryIndexedValue">ForceIncluded</s:String></wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/BeReadyBackend/BeReadyBackend.csproj b/BeReadyBackend/BeReadyBackend.csproj
index 1697993..a7df42c 100644
--- a/BeReadyBackend/BeReadyBackend.csproj
+++ b/BeReadyBackend/BeReadyBackend.csproj
@@ -15,6 +15,7 @@
         <PackageReference Include="FastEndpoints.Security" Version="7.2.0" />
         <PackageReference Include="FastEndpoints.Swagger" Version="7.2.0" />
         <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="8.0.24"/>
+        <PackageReference Include="Microsoft.AspNetCore.SignalR" Version="1.2.9" />
         <PackageReference Include="Microsoft.EntityFrameworkCore" Version="8.0.20" />
         <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.20">
           <PrivateAssets>all</PrivateAssets>
diff --git a/BeReadyBackend/Endpoints/Groups/GetGroupRankingEndpoint.cs b/BeReadyBackend/Endpoints/Groups/GetGroupRankingEndpoint.cs
index dbc50bf..6ffd46c 100644
--- a/BeReadyBackend/Endpoints/Groups/GetGroupRankingEndpoint.cs
+++ b/BeReadyBackend/Endpoints/Groups/GetGroupRankingEndpoint.cs
@@ -36,7 +36,12 @@ public class GetGroupRankingEndpoint(
         foreach (UserGroup member in group.UserGroups!)
         {
             if (member.Proof is null) member.Score -= 2;
+
+            if (!member.VotedProofId.HasValue) continue;
+            User? votedUser = await usersRepository.SingleOrDefaultAsync(new GetUserByIdSpec(member.VotedProofId.Value), ct);
+            if (votedUser is not null) votedUser.Score++;
         }
+        await usersRepository.SaveChangesAsync(ct);
         await userGroupsRepository.SaveChangesAsync(ct);
 
         List<GetGroupRankingDto> groupScore = await userGroupsRepository.ProjectToListAsync<GetGroupRankingDto>(new GetGroupRankSpec(req.Id), ct);
diff --git a/BeReadyBackend/Endpoints/Groups/PatchGroupUserProofEndpoint.cs b/BeReadyBackend/Endpoints/Groups/PatchGroupUserProofEndpoint.cs
index 1d25495..035b3fd 100644
--- a/BeReadyBackend/Endpoints/Groups/PatchGroupUserProofEndpoint.cs
+++ b/BeReadyBackend/Endpoints/Groups/PatchGroupUserProofEndpoint.cs
@@ -1,8 +1,10 @@
-using BeReadyBackend.Models;
+using BeReadyBackend.Hubs;
+using BeReadyBackend.Models;
 using BeReadyBackend.Repositories;
 using BeReadyBackend.Services;
 using BeReadyBackend.Specifications.Groups;
 using FastEndpoints;
+using Microsoft.AspNetCore.SignalR;
 
 namespace BeReadyBackend.Endpoints.Groups;
 
@@ -12,7 +14,7 @@ public class UserProofRequest
     public string? Proof { get; set; }
 }
 
-public class PatchGroupUserProofEndpoint(UserGroupsRepository userGroupsRepository, UserService userService) : Endpoint<UserProofRequest>
+public class PatchGroupUserProofEndpoint(UserGroupsRepository userGroupsRepository, UserService userService, IHubContext<GroupHub> hubContext) : Endpoint<UserProofRequest>
 {
     public override void Configure()
     {
@@ -35,7 +37,7 @@ public class PatchGroupUserProofEndpoint(UserGroupsRepository userGroupsReposito
             await Send.StringAsync("Vous avez déjà déposé une photo", 400, cancellation: ct);
             return;
         }
-        
+
         if (member.Group!.IsFinished)
         {
             await Send.StringAsync("Ce défi est terminé", 400, cancellation: ct);
@@ -44,6 +46,9 @@ public class PatchGroupUserProofEndpoint(UserGroupsRepository userGroupsReposito
 
         member.Proof = req.Proof;
         await userGroupsRepository.SaveChangesAsync(ct);
+
+        await hubContext.Clients.Group($"group-{req.GroupId}").SendAsync("ReceiveProof", req.Proof, cancellationToken: ct);
+
         await Send.OkAsync(ct);
     }
 }
\ No newline at end of file
diff --git a/BeReadyBackend/Endpoints/Groups/StartVoteEndpoint.cs b/BeReadyBackend/Endpoints/Groups/StartVoteEndpoint.cs
index f3ad82a..15f8303 100644
--- a/BeReadyBackend/Endpoints/Groups/StartVoteEndpoint.cs
+++ b/BeReadyBackend/Endpoints/Groups/StartVoteEndpoint.cs
@@ -1,8 +1,10 @@
-using BeReadyBackend.Models;
+using BeReadyBackend.Hubs;
+using BeReadyBackend.Models;
 using BeReadyBackend.Repositories;
 using BeReadyBackend.Services;
 using BeReadyBackend.Specifications.Groups;
 using FastEndpoints;
+using Microsoft.AspNetCore.SignalR;
 using Group = BeReadyBackend.Models.Group;
 
 namespace BeReadyBackend.Endpoints.Groups;
@@ -12,20 +14,21 @@ public class GroupVoteRequest
     public int Id { get; set; }
 }
 
-public class StartVoteEndpoint(UserGroupsRepository userGroupsRepository, GroupsRepository groupsRepository, UserService userService) : Endpoint<GroupVoteRequest>
+public class StartVoteEndpoint(UserGroupsRepository userGroupsRepository, GroupsRepository groupsRepository, UserService userService, IHubContext<GroupHub> hubContext)
+    : Endpoint<GroupVoteRequest>
 {
     public override void Configure()
     {
         Post("/Groups/{@Id}/Vote/", x => new { x.Id });
     }
-    
+
     public override async Task HandleAsync(GroupVoteRequest req, CancellationToken ct)
     {
         Group? group = await groupsRepository.SingleOrDefaultAsync(new GetGroupByIdSpec(req.Id), ct);
-        
+
         if (group is null)
         {
-            await Send.NotFoundAsync(ct); 
+            await Send.NotFoundAsync(ct);
             return;
         }
 
@@ -33,23 +36,23 @@ public class StartVoteEndpoint(UserGroupsRepository userGroupsRepository, Groups
 
         if (userGroup?.Grade != "Admin")
         {
-            await Send.StringAsync("Vous ne pouvez pas lancer le vote", 400, cancellation: ct); 
+            await Send.StringAsync("Vous ne pouvez pas lancer le vote", 400, cancellation: ct);
             return;
         }
 
         if (group.IsFinished)
         {
-            await Send.StringAsync("Le défi est terminé", 400, cancellation: ct); 
+            await Send.StringAsync("Le défi est terminé", 400, cancellation: ct);
             return;
         }
 
         if (group.CreationDate.AddHours(group.Duration) > DateTime.Now)
         {
-            await Send.StringAsync("Le défi n'est pas terminé", 400, cancellation: ct); 
+            await Send.StringAsync("Le défi n'est pas terminé", 400, cancellation: ct);
             return;
         }
-        
+
+        await hubContext.Clients.Group($"group-{req.Id}").SendAsync("StartVote", cancellationToken: ct);
         await Send.OkAsync(ct);
     }
-
 }
\ No newline at end of file
diff --git a/BeReadyBackend/Hubs/GroupHub.cs b/BeReadyBackend/Hubs/GroupHub.cs
new file mode 100644
index 0000000..79d3536
--- /dev/null
+++ b/BeReadyBackend/Hubs/GroupHub.cs
@@ -0,0 +1,32 @@
+using Microsoft.AspNetCore.SignalR;
+using Microsoft.Extensions.Primitives;
+
+namespace BeReadyBackend.Hubs;
+
+public class GroupHub : Hub
+{
+    public async Task SendProofToGroup(int groupId, string proofUrl)
+    {
+        await Clients.Group($"group-{groupId}").SendAsync("ReceiveProof", proofUrl);
+    }
+    
+    public async Task SendMessageToGroup(int groupId, string message)
+    {
+        await Clients.Group($"group-{groupId}").SendAsync("ReceiveMessage", message);
+    }
+    
+    public async Task StartVoteIntoGroup(int groupId)
+    {
+        await Clients.Group($"group-{groupId}").SendAsync("StartVote");
+    }
+    
+    public override async Task OnConnectedAsync()
+    {
+        HttpContext? httpContext = Context.GetHttpContext();
+        if (httpContext!.Request.Query.TryGetValue("groupId", out StringValues groupId))
+        {
+            await Groups.AddToGroupAsync(Context.ConnectionId, $"group-{groupId}");
+        }
+        await base.OnConnectedAsync();
+    }
+}
\ No newline at end of file
diff --git a/BeReadyBackend/Program.cs b/BeReadyBackend/Program.cs
index 6e0f8a7..9806d32 100644
--- a/BeReadyBackend/Program.cs
+++ b/BeReadyBackend/Program.cs
@@ -1,6 +1,7 @@
 using AutoMapper;
 using AutoMapper.EquivalencyExpression;
 using BeReadyBackend;
+using BeReadyBackend.Hubs;
 using BeReadyBackend.MappingProfiles;
 using FastEndpoints;
 using FastEndpoints.Swagger;
@@ -27,10 +28,7 @@ builder.Services
                 .WithExposedHeaders(HeaderNames.ContentDisposition);
         });
     })
-    .SwaggerDocument(options =>
-    {
-        options.ShortSchemaNames = true;
-    });
+    .SwaggerDocument(options => { options.ShortSchemaNames = true; });
 
 builder.Services.AddDbContext<BeReadyDbContext>();
 
@@ -45,6 +43,8 @@ builder.Services.AddScoped<UserGroupsRepository>();
 builder.Services.AddScoped<UserRandomChallengesRepository>();
 builder.Services.AddScoped<UsersRepository>();
 
+builder.Services.AddSignalR();
+
 builder.Services.AddHttpContextAccessor();
 
 builder.Services.AddScoped<UserService>();
@@ -70,6 +70,8 @@ app.UseAuthentication()
     })
     .UseSwaggerGen();
 
+app.MapHub<GroupHub>("/groupHub");
+
 // app.UseHttpsRedirection();
 
 // app.UseCors();