diff --git a/MosswartMassacre/MosswartMassacre.csproj b/MosswartMassacre/MosswartMassacre.csproj
index fcb5186..6bdba56 100644
--- a/MosswartMassacre/MosswartMassacre.csproj
+++ b/MosswartMassacre/MosswartMassacre.csproj
@@ -10,6 +10,7 @@
     <RootNamespace>MosswartMassacre</RootNamespace>
     <AssemblyName>MosswartMassacre</AssemblyName>
     <TargetFrameworkVersion>v4.8</TargetFrameworkVersion>
+	 <LangVersion>8.0</LangVersion>
     <FileAlignment>512</FileAlignment>
     <Deterministic>true</Deterministic>
   </PropertyGroup>
diff --git a/MosswartMassacre/Telemetry.cs b/MosswartMassacre/Telemetry.cs
index dc57ec3..7facf99 100644
--- a/MosswartMassacre/Telemetry.cs
+++ b/MosswartMassacre/Telemetry.cs
@@ -1,110 +1,107 @@
-using System;
+// Telemetry.cs  ───────────────────────────────────────────────────────────────
+using System;
 using System.Net.Http;
 using System.Text;
-using System.Timers;
+using System.Threading;
+using System.Threading.Tasks;
 using Decal.Adapter;
 using Newtonsoft.Json;
 
 namespace MosswartMassacre
 {
-    /// <summary>
-    ///  Periodically sends gameplay telemetry to your FastAPI collector.
-    ///  Toggle with:  Telemetry.Start() / Telemetry.Stop()
-    /// </summary>
     public static class Telemetry
     {
-        /* ============  CONFIG  ============ */
-
-        private const string Endpoint = "https://mosswart.snakedesert.se/position";
-        private const string SharedSecret = "your_shared_secret";
-        private const int IntervalSec = 5;      // send every 5 s
-
-        /* ============  internals  ========== */
+        /* ───────────── configuration ───────────── */
+        private const string Endpoint = "https://mosswart.snakedesert.se/position/"; // <- trailing slash!
+        private const string SharedSecret = "your_shared_secret";                        // <- keep in sync
+        private const int IntervalSec = 5;                                           // seconds between posts
 
+        /* ───────────── runtime state ───────────── */
         private static readonly HttpClient _http = new HttpClient();
-        private static Timer _timer;
-        private static bool _enabled;
         private static string _sessionId;
+        private static CancellationTokenSource _cts;
+        private static bool _enabled;
 
-        /* ============  public API  ========= */
-
+        /* ───────────── public API ───────────── */
         public static void Start()
         {
-            if (_enabled) return;                         // already on
-
-            _sessionId = $"{CoreManager.Current.CharacterFilter.Name}-{DateTime.UtcNow:yyyyMMdd-HHmmss}";
-            _timer = new Timer(IntervalSec * 1000);
-            _timer.Elapsed += (_, __) => SendSnapshot();
-            _timer.Start();
+            if (_enabled) return;
 
             _enabled = true;
+            _sessionId = $"{CoreManager.Current.CharacterFilter.Name}-{DateTime.UtcNow:yyyyMMdd-HHmmss}";
+            _cts = new CancellationTokenSource();
+
             PluginCore.WriteToChat("[Telemetry] HTTP streaming ENABLED");
-            PluginCore.WriteToChat("[Tel] timer every " + IntervalSec + " s");
+
+            _ = Task.Run(() => LoopAsync(_cts.Token));   // fire-and-forget
         }
 
         public static void Stop()
         {
             if (!_enabled) return;
-
+            _cts.Cancel();
             _enabled = false;
-            _timer?.Stop();
-            _timer?.Dispose();
-            _timer = null;
-
             PluginCore.WriteToChat("[Telemetry] HTTP streaming DISABLED");
         }
 
-        /* ============  snapshot builder  === */
-
-        private static async void SendSnapshot()
+        /* ───────────── async loop ───────────── */
+        private static async Task LoopAsync(CancellationToken token)
         {
-            try
+            while (!token.IsCancellationRequested)
             {
-                var coords = Coordinates.Me;
-
-                var payload = new
+                try
                 {
-                    character_name = CoreManager.Current.CharacterFilter.Name,
-                    char_tag = PluginCore.CharTag,
-                    session_id = _sessionId,
-                    timestamp = DateTime.UtcNow.ToString("o"),
-
-                    ew = coords.EW,
-                    ns = coords.NS,
-                    z = coords.Z,
-
-                    kills = PluginCore.totalKills,
-                    deaths = 0,
-                    rares_found = PluginCore.rareCount,
-                    prismatic_taper_count = 0,
-                    vt_state = "Unknown"
-                };
-
-                string json = JsonConvert.SerializeObject(payload);
-
-                var req = new HttpRequestMessage(HttpMethod.Post, Endpoint)
-                {
-                    Content = new StringContent(json, Encoding.UTF8, "application/json")
-                };
-                req.Headers.Add("X-Plugin-Secret", SharedSecret);
-
-                /* ---------- NEW: wait for response & print result ---------- */
-                var resp = await _http.SendAsync(req);
-                if (resp.IsSuccessStatusCode)
-                {
-                    PluginCore.WriteToChat($"[Tel] ✓ {resp.StatusCode}");
+                    await SendSnapshotAsync(token);
                 }
-                else
+                catch (Exception ex)
                 {
-                    PluginCore.WriteToChat($"[Tel] ✗ {resp.StatusCode}  ({await resp.Content.ReadAsStringAsync()})");
+                    PluginCore.WriteToChat($"[Telemetry] send failed: {ex.Message}");
                 }
-            }
-            catch (Exception ex)
-            {
-                var inner = ex.InnerException?.Message ?? "no inner msg";
-                PluginCore.WriteToChat($"[Tel] FAILED — {ex.GetType().Name}: {ex.Message}  ⇢  {inner}");
+
+                try
+                {
+                    await Task.Delay(TimeSpan.FromSeconds(IntervalSec), token);
+                }
+                catch (TaskCanceledException) { }   // expected on Stop()
             }
         }
 
+        /* ───────────── single POST ───────────── */
+        private static async Task SendSnapshotAsync(CancellationToken token)
+        {
+            var coords = Coordinates.Me;
+
+            var payload = new
+            {
+                character_name = CoreManager.Current.CharacterFilter.Name,
+                char_tag = PluginCore.CharTag,
+                session_id = _sessionId,
+                timestamp = DateTime.UtcNow.ToString("o"),
+
+                ew = coords.EW,
+                ns = coords.NS,
+                z = coords.Z,
+
+                kills = PluginCore.totalKills,
+                deaths = 0,
+                rares_found = PluginCore.rareCount,
+                prismatic_taper_count = 0,
+                vt_state = "Unknown"
+            };
+
+            string json = JsonConvert.SerializeObject(payload);
+            var req = new HttpRequestMessage(HttpMethod.Post, Endpoint)
+            {
+                Content = new StringContent(json, Encoding.UTF8, "application/json")
+            };
+            req.Headers.Add("X-Plugin-Secret", SharedSecret);
+
+            using var resp = await _http.SendAsync(req, token);
+
+            if (!resp.IsSuccessStatusCode)    // stay quiet on success
+            {
+                PluginCore.WriteToChat($"[Telemetry] server replied {resp.StatusCode}");
+            }
+        }
     }
 }