diff --git a/src/InterruptHandler.cpp b/src/InterruptHandler.cpp
index 31968c4..eedf0eb 100644
--- a/src/InterruptHandler.cpp
+++ b/src/InterruptHandler.cpp
@@ -113,7 +113,7 @@ static void beepTask(void *pvParameters)
 
     for (;;)
     {
-        xSemaphoreTake(beepSemaphore, portMAX_DELAY);
+        ulTaskNotifyTake(pdTRUE, portMAX_DELAY);
 
         const uint32_t tMillis = millis();