diff --git a/platformio.ini b/platformio.ini
index 800e746..8f1b96b 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -9,7 +9,7 @@ monitor_speed = 115200
 test_framework = unity
 test_build_src = no
 lib_deps = 
-    ESP32Async/ESPAsyncWebServer
+    ESP32Async/ESPAsyncWebServer@3.8.1
 
 [env:esp32]
 platform = espressif32
@@ -19,5 +19,5 @@ monitor_speed = 115200
 test_framework = unity
 test_build_src = no
 lib_deps = 
-    ESP32Async/ESPAsyncWebServer
+    ESP32Async/ESPAsyncWebServer@3.8.1