diff --git a/ProjectLighthouse.Servers.GameServer/Controllers/UserController.cs b/ProjectLighthouse.Servers.GameServer/Controllers/UserController.cs
index ace3b945..fb5b6128 100644
--- a/ProjectLighthouse.Servers.GameServer/Controllers/UserController.cs
+++ b/ProjectLighthouse.Servers.GameServer/Controllers/UserController.cs
@@ -1,4 +1,3 @@
-#nullable enable
 using System.Text.Json;
 using LBPUnion.ProjectLighthouse.Database;
 using LBPUnion.ProjectLighthouse.Extensions;
@@ -82,7 +81,7 @@ public class UserController : ControllerBase
         if (update.Location != null) user.Location = update.Location;
 
         // ReSharper disable once LoopCanBeConvertedToQuery
-        foreach (string? resource in new[]{update.IconHash, update.YayHash, update.MehHash, update.BooHash, update.PlanetHash,})
+        foreach (string? resource in new[]{update.IconHash, update.YayHash, update.MehHash, update.BooHash,})
         {
             if (string.IsNullOrWhiteSpace(resource)) continue;
 
@@ -91,6 +90,9 @@ public class UserController : ControllerBase
             if (!GameResourceHelper.IsValidTexture(resource)) return this.BadRequest();
         }
 
+        if (!string.IsNullOrWhiteSpace(update.PlanetHash) && !GameResourceHelper.IsValidLevel(update.PlanetHash))
+            return this.BadRequest();
+
         if (update.IconHash != null) user.IconHash = update.IconHash;
 
         if (update.YayHash != null) user.YayHash = update.YayHash;
diff --git a/ProjectLighthouse.Servers.GameServer/Helpers/GameResourceHelper.cs b/ProjectLighthouse.Servers.GameServer/Helpers/GameResourceHelper.cs
index 3932724e..597f3833 100644
--- a/ProjectLighthouse.Servers.GameServer/Helpers/GameResourceHelper.cs
+++ b/ProjectLighthouse.Servers.GameServer/Helpers/GameResourceHelper.cs
@@ -37,4 +37,13 @@ public static class GameResourceHelper
         return LbpFile.FromHash(resource)?.FileType is LbpFileType.Png or LbpFileType.Jpeg or LbpFileType.Painting
             or LbpFileType.Texture;
     }
+
+    public static bool IsValidLevel(string resource)
+    {
+        if (!FileHelper.IsResourceValid(resource)) return false;
+
+        // Technically this method could be used (and is used) to check if a planet is valid,
+        // but I'm keeping the method name as is for semantic reasons.
+        return LbpFile.FromHash(resource)?.FileType is LbpFileType.Level;
+    }
 }
\ No newline at end of file