diff --git a/Minecraft-Realms-Emulator/Controllers/WorldsController.cs b/Minecraft-Realms-Emulator/Controllers/WorldsController.cs
index 0e80380..4e88f64 100644
--- a/Minecraft-Realms-Emulator/Controllers/WorldsController.cs
+++ b/Minecraft-Realms-Emulator/Controllers/WorldsController.cs
@@ -1,11 +1,13 @@
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Internal;
 using Minecraft_Realms_Emulator.Attributes;
 using Minecraft_Realms_Emulator.Data;
 using Minecraft_Realms_Emulator.Entities;
 using Minecraft_Realms_Emulator.Requests;
 using Minecraft_Realms_Emulator.Responses;
 using Newtonsoft.Json;
+using Semver;
 
 namespace Minecraft_Realms_Emulator.Controllers
 {
@@ -28,6 +30,7 @@ namespace Minecraft_Realms_Emulator.Controllers
 
             string playerUUID = cookie.Split(";")[0].Split(":")[2];
             string playerName = cookie.Split(";")[1].Split("=")[1];
+            string gameVersion = cookie.Split(";")[2].Split("=")[1];
 
             var ownedWorlds = await _context.Worlds.Where(w => w.OwnerUUID == playerUUID).Include(w => w.Subscription).ToListAsync();
             var memberWorlds = await _context.Players.Where(p => p.Uuid == playerUUID && p.Accepted).Include(p => p.World.Subscription).Select(p => p.World).ToListAsync();
@@ -49,7 +52,8 @@ namespace Minecraft_Realms_Emulator.Controllers
                     MinigameName = null,
                     MinigameImage = null,
                     ActiveSlot = 1,
-                    Member = false
+                    Member = false,
+                    ActiveVersion = gameVersion
                 };
 
                 ownedWorlds.Add(world);
@@ -60,6 +64,9 @@ namespace Minecraft_Realms_Emulator.Controllers
 
             foreach (var world in ownedWorlds)
             {
+                int versionsCompared = SemVersion.Parse(gameVersion, SemVersionStyles.Strict).ComparePrecedenceTo(SemVersion.Parse(world.ActiveVersion, SemVersionStyles.Strict));
+                string isCompatible = versionsCompared == 0 ? "COMPATIBLE" : versionsCompared < 0 ? "NEEDS_DOWNGRADE" : "NEEDS_UPGRADE";
+
                 WorldResponse response = new()
                 {
                     Id = world.Id,
@@ -75,7 +82,9 @@ namespace Minecraft_Realms_Emulator.Controllers
                     MinigameImage = world.MinigameImage,
                     ActiveSlot = world.ActiveSlot,
                     Member = world.Member,
-                    Players = world.Players
+                    Players = world.Players,
+                    ActiveVersion = world.ActiveVersion,
+                    Compatibility = isCompatible
                 };
 
                 if (world.Subscription != null)
@@ -90,6 +99,9 @@ namespace Minecraft_Realms_Emulator.Controllers
 
             foreach (var world in memberWorlds)
             {
+                int versionsCompared = SemVersion.Parse(gameVersion, SemVersionStyles.Strict).ComparePrecedenceTo(SemVersion.Parse(world.ActiveVersion, SemVersionStyles.Strict));
+                string isCompatible = versionsCompared == 0 ? "COMPATIBLE" : versionsCompared < 0 ? "NEEDS_DOWNGRADE" : "NEEDS_UPGRADE";
+
                 WorldResponse response = new()
                 {
                     Id = world.Id,
@@ -108,7 +120,9 @@ namespace Minecraft_Realms_Emulator.Controllers
                     Players = world.Players,
                     DaysLeft = 0,
                     Expired = ((DateTimeOffset)world.Subscription.StartDate.AddDays(30) - DateTime.Today).Days < 0,
-                    ExpiredTrial = false
+                    ExpiredTrial = false,
+                    ActiveVersion = world.ActiveVersion,
+                    Compatibility = isCompatible
                 };
 
                 allWorlds.Add(response);
@@ -125,10 +139,16 @@ namespace Minecraft_Realms_Emulator.Controllers
         [HttpGet("{id}")]
         public async Task<ActionResult<WorldResponse>> GetWorldById(int id)
         {
+            string cookie = Request.Headers.Cookie;
+            string gameVersion = cookie.Split(";")[2].Split("=")[1];
+
             var world = await _context.Worlds.Include(w => w.Players).Include(w => w.Subscription).FirstOrDefaultAsync(w => w.Id == id);
 
             if (world?.Subscription == null) return NotFound("World not found");
 
+            int versionsCompared = SemVersion.Parse(gameVersion, SemVersionStyles.Strict).ComparePrecedenceTo(SemVersion.Parse(world.ActiveVersion, SemVersionStyles.Strict));
+            string isCompatible = versionsCompared == 0 ? "COMPATIBLE" : versionsCompared < 0 ? "NEEDS_DOWNGRADE" : "NEEDS_UPGRADE";
+
             WorldResponse response = new()
             {
                 Id = world.Id,
@@ -143,11 +163,14 @@ namespace Minecraft_Realms_Emulator.Controllers
                 MinigameName = world.MinigameName,
                 MinigameImage = world.MinigameImage,
                 ActiveSlot = world.ActiveSlot,
+                Slots = world.Slots,
                 Member = world.Member,
                 Players = world.Players,
                 DaysLeft = ((DateTimeOffset)world.Subscription.StartDate.AddDays(30) - DateTime.Today).Days,
                 Expired = ((DateTimeOffset)world.Subscription.StartDate.AddDays(30) - DateTime.Today).Days < 0,
-                ExpiredTrial = false
+                ExpiredTrial = false,
+                ActiveVersion = world.ActiveVersion,
+                Compatibility = isCompatible
             };
 
             return response;
diff --git a/Minecraft-Realms-Emulator/Entities/World.cs b/Minecraft-Realms-Emulator/Entities/World.cs
index cbee5ca..c14b5b6 100644
--- a/Minecraft-Realms-Emulator/Entities/World.cs
+++ b/Minecraft-Realms-Emulator/Entities/World.cs
@@ -20,5 +20,6 @@ namespace Minecraft_Realms_Emulator.Entities
         public int ActiveSlot { get; set; } = 1;
         public JsonDocument[] Slots { get; set; } = [];
         public bool Member { get; set; } = false;
+        public string ActiveVersion { get; set; } = null!;
     }
 }
\ No newline at end of file
diff --git a/Minecraft-Realms-Emulator/Migrations/20240421111457_Worlds_Version.Designer.cs b/Minecraft-Realms-Emulator/Migrations/20240421111457_Worlds_Version.Designer.cs
new file mode 100644
index 0000000..fab8e68
--- /dev/null
+++ b/Minecraft-Realms-Emulator/Migrations/20240421111457_Worlds_Version.Designer.cs
@@ -0,0 +1,317 @@
+// <auto-generated />
+using System;
+using System.Text.Json;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Minecraft_Realms_Emulator.Data;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace Minecraft_Realms_Emulator.Migrations
+{
+    [DbContext(typeof(DataContext))]
+    [Migration("20240421111457_Worlds_Version")]
+    partial class Worlds_Version
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.4")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("Minecraft_Realms_Emulator.Entities.Backup", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("BackupId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<long>("LastModifiedDate")
+                        .HasColumnType("bigint");
+
+                    b.Property<JsonDocument>("Metadata")
+                        .IsRequired()
+                        .HasColumnType("jsonb");
+
+                    b.Property<int>("Size")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("WorldId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("WorldId");
+
+                    b.ToTable("Backups");
+                });
+
+            modelBuilder.Entity("Minecraft_Realms_Emulator.Entities.Configuration", b =>
+                {
+                    b.Property<string>("Key")
+                        .HasColumnType("text");
+
+                    b.Property<object>("Value")
+                        .IsRequired()
+                        .HasColumnType("jsonb");
+
+                    b.HasKey("Key");
+
+                    b.ToTable("Configuration");
+                });
+
+            modelBuilder.Entity("Minecraft_Realms_Emulator.Entities.Connection", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("Address")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("PendingUpdate")
+                        .HasColumnType("boolean");
+
+                    b.Property<int>("WorldId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("WorldId");
+
+                    b.ToTable("Connections");
+                });
+
+            modelBuilder.Entity("Minecraft_Realms_Emulator.Entities.Invite", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("Date")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("InvitationId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("RecipeintUUID")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("WorldId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("WorldId");
+
+                    b.ToTable("Invites");
+                });
+
+            modelBuilder.Entity("Minecraft_Realms_Emulator.Entities.Player", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<bool>("Accepted")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<bool>("Online")
+                        .HasColumnType("boolean");
+
+                    b.Property<bool>("Operator")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("Permission")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Uuid")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("WorldId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("WorldId");
+
+                    b.ToTable("Players");
+                });
+
+            modelBuilder.Entity("Minecraft_Realms_Emulator.Entities.Subscription", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<DateTime>("StartDate")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("SubscriptionType")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("WorldId")
+                        .HasColumnType("integer");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("WorldId")
+                        .IsUnique();
+
+                    b.ToTable("Subscriptions");
+                });
+
+            modelBuilder.Entity("Minecraft_Realms_Emulator.Entities.World", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<int>("ActiveSlot")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("ActiveVersion")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<int>("MaxPlayers")
+                        .HasColumnType("integer");
+
+                    b.Property<bool>("Member")
+                        .HasColumnType("boolean");
+
+                    b.Property<int?>("MinigameId")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("MinigameImage")
+                        .HasColumnType("text");
+
+                    b.Property<string>("MinigameName")
+                        .HasColumnType("text");
+
+                    b.Property<string>("Motd")
+                        .HasColumnType("text");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("text");
+
+                    b.Property<string>("Owner")
+                        .HasColumnType("text");
+
+                    b.Property<string>("OwnerUUID")
+                        .HasColumnType("text");
+
+                    b.Property<JsonDocument[]>("Slots")
+                        .IsRequired()
+                        .HasColumnType("jsonb[]");
+
+                    b.Property<string>("State")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("WorldType")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Worlds");
+                });
+
+            modelBuilder.Entity("Minecraft_Realms_Emulator.Entities.Backup", b =>
+                {
+                    b.HasOne("Minecraft_Realms_Emulator.Entities.World", "World")
+                        .WithMany()
+                        .HasForeignKey("WorldId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("World");
+                });
+
+            modelBuilder.Entity("Minecraft_Realms_Emulator.Entities.Connection", b =>
+                {
+                    b.HasOne("Minecraft_Realms_Emulator.Entities.World", "World")
+                        .WithMany()
+                        .HasForeignKey("WorldId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("World");
+                });
+
+            modelBuilder.Entity("Minecraft_Realms_Emulator.Entities.Invite", b =>
+                {
+                    b.HasOne("Minecraft_Realms_Emulator.Entities.World", "World")
+                        .WithMany()
+                        .HasForeignKey("WorldId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("World");
+                });
+
+            modelBuilder.Entity("Minecraft_Realms_Emulator.Entities.Player", b =>
+                {
+                    b.HasOne("Minecraft_Realms_Emulator.Entities.World", "World")
+                        .WithMany("Players")
+                        .HasForeignKey("WorldId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("World");
+                });
+
+            modelBuilder.Entity("Minecraft_Realms_Emulator.Entities.Subscription", b =>
+                {
+                    b.HasOne("Minecraft_Realms_Emulator.Entities.World", "World")
+                        .WithOne("Subscription")
+                        .HasForeignKey("Minecraft_Realms_Emulator.Entities.Subscription", "WorldId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("World");
+                });
+
+            modelBuilder.Entity("Minecraft_Realms_Emulator.Entities.World", b =>
+                {
+                    b.Navigation("Players");
+
+                    b.Navigation("Subscription");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/Minecraft-Realms-Emulator/Migrations/20240421111457_Worlds_Version.cs b/Minecraft-Realms-Emulator/Migrations/20240421111457_Worlds_Version.cs
new file mode 100644
index 0000000..0b22471
--- /dev/null
+++ b/Minecraft-Realms-Emulator/Migrations/20240421111457_Worlds_Version.cs
@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Minecraft_Realms_Emulator.Migrations
+{
+    /// <inheritdoc />
+    public partial class Worlds_Version : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "ActiveVersion",
+                table: "Worlds",
+                type: "text",
+                nullable: false,
+                defaultValue: "");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "ActiveVersion",
+                table: "Worlds");
+        }
+    }
+}
diff --git a/Minecraft-Realms-Emulator/Migrations/DataContextModelSnapshot.cs b/Minecraft-Realms-Emulator/Migrations/DataContextModelSnapshot.cs
index 12d1c8f..4369893 100644
--- a/Minecraft-Realms-Emulator/Migrations/DataContextModelSnapshot.cs
+++ b/Minecraft-Realms-Emulator/Migrations/DataContextModelSnapshot.cs
@@ -18,7 +18,7 @@ namespace Minecraft_Realms_Emulator.Migrations
         {
 #pragma warning disable 612, 618
             modelBuilder
-                .HasAnnotation("ProductVersion", "8.0.1")
+                .HasAnnotation("ProductVersion", "8.0.4")
                 .HasAnnotation("Relational:MaxIdentifierLength", 63);
 
             NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
@@ -199,6 +199,10 @@ namespace Minecraft_Realms_Emulator.Migrations
                     b.Property<int>("ActiveSlot")
                         .HasColumnType("integer");
 
+                    b.Property<string>("ActiveVersion")
+                        .IsRequired()
+                        .HasColumnType("text");
+
                     b.Property<int>("MaxPlayers")
                         .HasColumnType("integer");
 
diff --git a/Minecraft-Realms-Emulator/Minecraft-Realms-Emulator.csproj b/Minecraft-Realms-Emulator/Minecraft-Realms-Emulator.csproj
index 82c31c9..64d3f98 100644
--- a/Minecraft-Realms-Emulator/Minecraft-Realms-Emulator.csproj
+++ b/Minecraft-Realms-Emulator/Minecraft-Realms-Emulator.csproj
@@ -17,6 +17,7 @@
     </PackageReference>
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="8.0.2" />
+    <PackageReference Include="Semver" Version="2.3.0" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0" />
   </ItemGroup>
 
diff --git a/Minecraft-Realms-Emulator/Responses/WorldResponse.cs b/Minecraft-Realms-Emulator/Responses/WorldResponse.cs
index 233f340..964dbf3 100644
--- a/Minecraft-Realms-Emulator/Responses/WorldResponse.cs
+++ b/Minecraft-Realms-Emulator/Responses/WorldResponse.cs
@@ -6,5 +6,6 @@
         public int DaysLeft { get; set; } = 30;
         public bool Expired { get; set; } = false;
         public bool ExpiredTrial { get; set; } = false;
+        public string Compatibility { get; set; } = null!;
     }
 }
\ No newline at end of file