diff --git a/architecture.html b/architecture.html
index a3a868f..ec6a0b8 100644
--- a/architecture.html
+++ b/architecture.html
@@ -146,10 +146,10 @@
   <text x="550" y="409" fill="#d4d8f0" font-size="10">9  vTaskDelay(5 ms)       – gibt Core 1 für ISRs frei</text>
 
   <!-- ── FreeRTOS Primitives ── -->
-  <!-- beepSemaphore arrow: timerIsr → beepTask -->
+  <!-- Task Notification arrow: timerIsr → beepTask -->
   <line x1="530" y1="108" x2="432" y2="108" stroke="#4f8ef7" stroke-width="1.5" marker-end="url(#arr)" stroke-dasharray="5,3"/>
-  <rect x="442" y="98" width="82" height="18" rx="3" fill="#0f1117"/>
-  <text x="483" y="111" text-anchor="middle" fill="#4f8ef7" font-size="10">beepSemaphore</text>
+  <rect x="436" y="98" width="90" height="18" rx="3" fill="#0f1117"/>
+  <text x="481" y="111" text-anchor="middle" fill="#4f8ef7" font-size="10">Task Notification</text>
 
   <!-- rfEventQueue arrow: pinLevelChangeIsr → rfDecodeTask -->
   <line x1="530" y1="210" x2="432" y2="218" stroke="#4f8ef7" stroke-width="1.5" marker-end="url(#arr)" stroke-dasharray="5,3"/>