diff --git a/platformio.ini b/platformio.ini
index 1f072bfa..06e663c2 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -37,7 +37,7 @@ build_unflags =
     -std=gnu++11
 
 lib_deps =
-    mathieucarbou/ESP Async WebServer @ 2.8.1
+    mathieucarbou/ESP Async WebServer @ 2.9.0
     bblanchon/ArduinoJson @ ^6.21.5
     https://github.com/bertmelis/espMqttClient.git#v1.6.0
     nrf24/RF24 @ ^1.4.8